fix: bump Go version to 1.26

Upgrade Go toolchain from 1.24 to 1.26 across all build configurations.
Go 1.26 enforces FIPS-compliant system crypto for Microsoft compliance.

Changes:
- build/images.mk: GO_IMG 1.24 → 1.26-azurelinux3.0
- go.mod: go 1.24.1 → go 1.26
- install-go.sh: DEFAULT_IMAGE updated to Go 1.26 azurelinux3.0 SHA
- bpf-prog/ipv6-hp-bpf/linux.Dockerfile: updated to Go 1.26 MCR SHA
- npm/linux.Dockerfile, npm/windows.Dockerfile: 1.25.5 → 1.26
- .devcontainer/Dockerfile: VARIANT 1.24 → 1.26
- Regenerated all template Dockerfiles via make dockerfiles

SHAs:
- azurelinux3.0: sha256:eb3ce814e96f3319f1b5985021021682b47975f6decfe00eaac84abff0ae25c9
- MCR golang:1.26: sha256:6c27ae470941ef215b3eea86fcd6632a7ab975f391e5a75f546d3a76fd686705

Resolves #4365

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: behzad-mir

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-ARG VARIANT="1.24"
+ARG VARIANT="1.26"
 FROM mcr.microsoft.com/vscode/devcontainers/go:${VARIANT}
 RUN apt-get update && \
     export DEBIAN_FRONTEND=noninteractive && \

.pipelines/build/scripts/install-go.sh

@@ -12,7 +12,7 @@ set -eux
 #
 # To update the fallback, run:
 #   skopeo inspect docker://mcr.microsoft.com/oss/go/microsoft/golang:1.24-azurelinux3.0 --format "{{.Name}}@{{.Digest}}"
-DEFAULT_IMAGE="mcr.microsoft.com/oss/go/microsoft/golang@sha256:3999f970bb52b7413ef9be2803173d4fd7f1f3c59362a98a0c78d155e3a0e59f"
+DEFAULT_IMAGE="mcr.microsoft.com/oss/go/microsoft/golang@sha256:eb3ce814e96f3319f1b5985021021682b47975f6decfe00eaac84abff0ae25c9"
 
 # Resolves the golang image from the source Dockerfile for the given $name.
 # Echoes the image reference, or empty string if it cannot be determined.

azure-ip-masq-merger/Dockerfile

@@ -3,8 +3,8 @@
 ARG ARCH
 ARG OS
 
-# mcr.microsoft.com/oss/go/microsoft/golang:1.24-azurelinux3.0
-FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:bc7423b52b62e8f0281b5f7f564eb1862dc315bc57e1373c6a81e87ef3ac39ab AS go
+# mcr.microsoft.com/oss/go/microsoft/golang:1.26-azurelinux3.0
+FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:eb3ce814e96f3319f1b5985021021682b47975f6decfe00eaac84abff0ae25c9 AS go
 
 FROM go AS azure-ip-masq-merger
 ARG OS

azure-ipam/Dockerfile

@@ -5,8 +5,8 @@ ARG DROPGZ_VERSION=v0.0.12
 ARG OS_VERSION
 ARG OS
 
-# mcr.microsoft.com/oss/go/microsoft/golang:1.24-azurelinux3.0
-FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:bc7423b52b62e8f0281b5f7f564eb1862dc315bc57e1373c6a81e87ef3ac39ab AS go
+# mcr.microsoft.com/oss/go/microsoft/golang:1.26-azurelinux3.0
+FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:eb3ce814e96f3319f1b5985021021682b47975f6decfe00eaac84abff0ae25c9 AS go
 
 # mcr.microsoft.com/azurelinux/base/core:3.0
 FROM --platform=linux/${ARCH} mcr.microsoft.com/azurelinux/base/core@sha256:35149ae8dd179684f969944f54a337c665a64e702486154eb44253fb39c2505b AS mariner-core

azure-iptables-monitor/Dockerfile

@@ -8,8 +8,8 @@ FROM mcr.microsoft.com/azurelinux/base/core@sha256:35149ae8dd179684f969944f54a33
 # mcr.microsoft.com/azurelinux/distroless/base:3.0
 FROM mcr.microsoft.com/azurelinux/distroless/base@sha256:32820d2cf20e896aa9111742dd683dd0ccff370f742e256889bb3bb50320c0d4 AS mariner-distroless
 
-# mcr.microsoft.com/oss/go/microsoft/golang:1.24-azurelinux3.0
-FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:bc7423b52b62e8f0281b5f7f564eb1862dc315bc57e1373c6a81e87ef3ac39ab AS go
+# mcr.microsoft.com/oss/go/microsoft/golang:1.26-azurelinux3.0
+FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:eb3ce814e96f3319f1b5985021021682b47975f6decfe00eaac84abff0ae25c9 AS go
 
 
 FROM go AS azure-iptables-monitor

bpf-prog/ipv6-hp-bpf/linux.Dockerfile

@@ -1,6 +1,6 @@
 ARG ARCH
-# skopeo inspect docker://mcr.microsoft.com/oss/go/microsoft/golang:1.24 --format "{{.Name}}@{{.Digest}}"
-FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:f3e556c9de4dd93be774dc0fa2ce3cfa76f7744d0bacada92d1624f04ce69461 AS go
+# skopeo inspect docker://mcr.microsoft.com/oss/go/microsoft/golang:1.26 --format "{{.Name}}@{{.Digest}}"
+FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:6c27ae470941ef215b3eea86fcd6632a7ab975f391e5a75f546d3a76fd686705 AS go
 ARG VERSION
 ARG DEBUG
 ARG OS

build/images.mk

@@ -1,5 +1,5 @@
 # Source images
-export GO_IMG					?= mcr.microsoft.com/oss/go/microsoft/golang:1.24-azurelinux3.0
+export GO_IMG					?= mcr.microsoft.com/oss/go/microsoft/golang:1.26-azurelinux3.0
 export MARINER_CORE_IMG			?= mcr.microsoft.com/azurelinux/base/core:3.0
 export MARINER_DISTROLESS_IMG	?= mcr.microsoft.com/azurelinux/distroless/base:3.0
 export WIN_HPC_IMG				?= mcr.microsoft.com/oss/kubernetes/windows-host-process-containers-base-image:v1.0.0

cilium-log-collector/Dockerfile

@@ -3,8 +3,8 @@
 ARG ARCH
 ARG OS
 
-# mcr.microsoft.com/oss/go/microsoft/golang:1.24-azurelinux3.0
-FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:bc7423b52b62e8f0281b5f7f564eb1862dc315bc57e1373c6a81e87ef3ac39ab AS go
+# mcr.microsoft.com/oss/go/microsoft/golang:1.26-azurelinux3.0
+FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:eb3ce814e96f3319f1b5985021021682b47975f6decfe00eaac84abff0ae25c9 AS go
 
 FROM go AS fluent-bit-plugin
 ARG VERSION

cni/Dockerfile

@@ -5,8 +5,8 @@ ARG DROPGZ_VERSION=v0.0.12
 ARG OS_VERSION
 ARG OS
 
-# mcr.microsoft.com/oss/go/microsoft/golang:1.24-azurelinux3.0
-FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:bc7423b52b62e8f0281b5f7f564eb1862dc315bc57e1373c6a81e87ef3ac39ab AS go
+# mcr.microsoft.com/oss/go/microsoft/golang:1.26-azurelinux3.0
+FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:eb3ce814e96f3319f1b5985021021682b47975f6decfe00eaac84abff0ae25c9 AS go
 
 # mcr.microsoft.com/azurelinux/base/core:3.0
 FROM --platform=linux/${ARCH} mcr.microsoft.com/azurelinux/base/core@sha256:35149ae8dd179684f969944f54a337c665a64e702486154eb44253fb39c2505b AS mariner-core

cns/Dockerfile

@@ -4,8 +4,8 @@ ARG ARCH
 ARG OS_VERSION
 ARG OS
 
-# mcr.microsoft.com/oss/go/microsoft/golang:1.24-azurelinux3.0
-FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:bc7423b52b62e8f0281b5f7f564eb1862dc315bc57e1373c6a81e87ef3ac39ab AS go
+# mcr.microsoft.com/oss/go/microsoft/golang:1.26-azurelinux3.0
+FROM --platform=linux/${ARCH} mcr.microsoft.com/oss/go/microsoft/golang@sha256:eb3ce814e96f3319f1b5985021021682b47975f6decfe00eaac84abff0ae25c9 AS go
 
 # mcr.microsoft.com/azurelinux/base/core:3.0
 FROM mcr.microsoft.com/azurelinux/base/core@sha256:35149ae8dd179684f969944f54a337c665a64e702486154eb44253fb39c2505b AS mariner-core