[6.3.0] Wire credential helper to repository fetching.#18429

iancha1992 merged 2 commits intobazelbuild:release-6.3.0bazelbuild/bazel:release-6.3.0from

tjgq:credhelper-repofetch-cherrypicktjgq/bazel:credhelper-repofetch-cherrypickCopy head branch name to clipboard