Simplify .gitconfig mount - use existing repository mount

Removed separate .gitconfig mount as the file is already accessible
through the main repository mount at /github.com/vmware-tanzu/velero.
Git automatically finds the configuration file in the working directory.

This approach is simpler, more robust, and avoids any path issues.

Author: kaovilai

.gitconfig

@@ -1,7 +1,7 @@
 # Git configuration for containerized builds
 # 
-# This file is mounted as ~/.gitconfig in the container by the 'shell'
-# target in the Makefile to fix VCS stamping errors in Podman environments.
+# This file is available in the container working directory through the main
+# repository mount to fix VCS stamping errors in Podman environments.
 #
 # When Docker/Podman mounts the repository, the mount point directory
 # (/github.com/vmware-tanzu/velero) is owned by root:root but the files

Makefile

@@ -213,7 +213,6 @@ shell: build-dirs build-env
 		-v "$$(pwd)/.go/std/$(GOOS)/$(GOARCH):/usr/local/go/pkg/$(GOOS)_$(GOARCH)_static:delegated" \
 		-v "$$(pwd)/.go/go-build:/.cache/go-build:delegated" \
 		-v "$$(pwd)/.go/golangci-lint:/.cache/golangci-lint:delegated" \
-		-v "$$(pwd)/.gitconfig:$$HOME/.gitconfig:ro" \
 		-w /github.com/vmware-tanzu/velero \
 		$(BUILDER_IMAGE) \
 		/bin/sh $(CMD)