Remove go.work before container build

The go.work file is generated by the CI environment which may have a
higher Go version than the build image (go-toolset). This causes build
failures when go.work references a Go version that the build image
does not provide. Since the Dockerfile builds a single module, go.work
is not needed and can be safely removed before building.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Martin Schuppert <mschuppert@redhat.com>
(cherry picked from commit 540876a)

Author: stuggi

Dockerfile

@@ -22,6 +22,10 @@ WORKDIR $REMOTE_SOURCE_DIR/$REMOTE_SOURCE_SUBDIR
 USER root
 RUN mkdir -p ${DEST_ROOT}/usr/local/bin/
 
+# Remove go.work - not needed for the build and may reference a Go version
+# from the CI environment that is higher than the build image provides
+RUN rm -f go.work go.work.sum
+
 # cache deps before building and copying source so that we don't need to re-download as much
 # and so that source changes don't invalidate our downloaded layer
 RUN if [ ! -f $CACHITO_ENV_FILE ]; then go mod download ; fi