Cherry pick PR #8564: [CI] Add branch name label to test invocation (#8573)

Refer to the original PR: #8564

This change modifies the GitHub Actions workflows for internal and
on-device tests. It adds the current Git branch name as a label to the
test invocation command for Sponge.

Bug: 474168791

Co-authored-by: Igor Sarkisov <isarkisov@google.com>

Author: cobalt-github-releaser-bot

.github/actions/e2e_tests/action.yaml

@@ -78,6 +78,7 @@ runs:
           --label repository-${GITHUB_REPO} \
           --label author-${GITHUB_PR_HEAD_USER_LOGIN:-$GITHUB_COMMIT_AUTHOR_USERNAME} \
           --label author_id-${GITHUB_PR_HEAD_USER_ID:-$GITHUB_COMMIT_AUTHOR_EMAIL} \
+          --label branch:${GITHUB_REF_NAME} \
           --dimensions '${{ inputs.test_dimensions }}' \
           --cobalt_path "${GCS_ARTIFACTS_PATH}" || {
             echo "Finished running tests..."

.github/actions/on_device_tests/action.yaml

@@ -87,6 +87,7 @@ runs:
           --label repository-${GITHUB_REPO} \
           --label author-${GITHUB_PR_HEAD_USER_LOGIN:-$GITHUB_COMMIT_AUTHOR_USERNAME} \
           --label author_id-${GITHUB_PR_HEAD_USER_ID:-$GITHUB_COMMIT_AUTHOR_EMAIL} \
+          --label branch:${GITHUB_REF_NAME} \
           --dimensions '${{ inputs.test_dimensions }}' \
           ${TEST_ATTEMPTS:+"--test_attempts" "$TEST_ATTEMPTS"} \
           --gcs_archive_path "${GCS_ARTIFACTS_PATH}" \