Configure git user for releng-ci-bazel test image
Configure git user for releng-ci-bazel test image

Some tests will require a valid configured git user, which we now ensure
globally inside the test image.

Signed-off-by: Sascha Grunert <70ab469ddb2ac3e35f32ed7c2fd1cca514b2e879@suse.com>

kubernetes/release,kubernetes/release