ci: clean up agent disk space before binary build (release/v1.7) (#4433)

* ci: clean up agent disk space before binary build

Adds a reusable steps template that frees disk space on the build
agent (removing hostedtoolcache, dotnet, android, chromium, etc.)
before the binary build runs. The binary build has been hitting
disk-pressure failures on the default build pool.

The cleanup script mirrors the one introduced for container builds
in #4109 and is now factored into a shared template
(.pipelines/templates/disk-cleanup.steps.yaml) for reuse.

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

* ci: use shared disk-cleanup template in container build

Replace the inline disk-cleanup script in
.pipelines/containers/container-template.yaml with a reference to
the shared template at .pipelines/templates/disk-cleanup.steps.yaml
(introduced in this PR). Behavior is unchanged.

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

* ci: preserve /opt/hostedtoolcache during disk cleanup

Keep the hosted toolcache (which contains Go) so subsequent steps can
use the agent's pre-installed Go toolchain.

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

---------

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

Author: jpayne3506

.pipelines/containers/container-template.yaml

@@ -13,28 +13,7 @@ steps:
     inlineScript: |
       az acr login -n $(ACR)
 
-- script: |
-    set -e
-    echo "Disk space before cleanup..."
-    df -h /
-    echo "Removing unnecessary files to free up disk space..."
-    sudo rm -rf \
-      /opt/hostedtoolcache \
-      /opt/google/chrome \
-      /opt/microsoft/msedge \
-      /opt/microsoft/powershell \
-      /opt/pipx \
-      /usr/lib/mono \
-      /usr/local/julia* \
-      /usr/local/lib/android \
-      /usr/local/lib/node_modules \
-      /usr/local/share/chromium \
-      /usr/local/share/powershell \
-      /usr/share/dotnet \
-      /usr/share/swift
-    echo "Disk space after cleanup..."
-    df -h /
-  displayName: "Clean up disk space"
+- template: ../templates/disk-cleanup.steps.yaml
 
 - script: |
     set -e

.pipelines/pipeline.yaml

@@ -75,6 +75,7 @@ stages:
           pool:
             name: "$(BUILD_POOL_NAME_DEFAULT)"
           steps:
+            - template: templates/disk-cleanup.steps.yaml
             - script: |
                 make bpf-lib
                 make all-binaries-platforms

.pipelines/templates/disk-cleanup.steps.yaml

@@ -0,0 +1,28 @@
+steps:
+  - script: |
+      set -e
+      echo "=== Tool locations BEFORE cleanup ==="
+      which go || true
+      go version || true
+      echo "=== Disk space BEFORE cleanup ==="
+      df -h /
+      echo "Removing unnecessary files to free up disk space..."
+      sudo rm -rf \
+        /opt/google/chrome \
+        /opt/microsoft/msedge \
+        /opt/microsoft/powershell \
+        /opt/pipx \
+        /usr/lib/mono \
+        /usr/local/julia* \
+        /usr/local/lib/android \
+        /usr/local/lib/node_modules \
+        /usr/local/share/chromium \
+        /usr/local/share/powershell \
+        /usr/share/dotnet \
+        /usr/share/swift
+      echo "=== Tool locations AFTER cleanup ==="
+      which go || true
+      go version || true
+      echo "=== Disk space AFTER cleanup ==="
+      df -h /
+    displayName: "Clean up disk space"