fix: keeper Dockerfile ADD_BUILD_TAGS argument

The core-keeper Dockerfile wasn't accounting for the ADD_BUILD_TAGS argument
that is set by the Makefile on `docker build` call. Not accouting for this
argument when NATS is required cause the core-keeper service to not have
NATS enabled, causing a bootstrap error. With this commit, the argument is
not considered.

Closes #5345

Signed-off-by: Bruno Meneguele <bmeneg@heredoc.io>

Author: bmeneg

cmd/core-keeper/Dockerfile

@@ -19,6 +19,8 @@
 ARG BUILDER_BASE=golang:1.25-alpine3.22
 FROM ${BUILDER_BASE} AS builder
 
+ARG ADD_BUILD_TAGS=""
+
 WORKDIR /edgex-go
 
 # The main mirrors are giving us timeout issues on builds periodically.
@@ -32,7 +34,7 @@ COPY go.mod vendor* ./
 RUN [ ! -d "vendor" ] && go mod download all || echo "skipping..."
 
 COPY . .
-RUN make cmd/core-keeper/core-keeper
+RUN make -e ADD_BUILD_TAGS=$ADD_BUILD_TAGS cmd/core-keeper/core-keeper
 
 #Next image - Copy built Go binary into new workspace
 FROM alpine:3.22