release: support kick off release in current branch

Currently when triggering release, it always pull remote repo and
checkout main branch. Any changes which are merged into the target
release branch (e.g. release-3.5) will be ignored. It isn't
convenient for test, including in github workflow and local environment.
So we need to support triggering release in current branch.

Note: --current-branch should only be called with DRY_RUN=true

Signed-off-by: Benjamin Wang <wachao@vmware.com>

scripts/test_lib.sh

@@ -410,14 +410,16 @@ function assert_no_git_modifications {
 #  - no differencing commits in relation to the origin/$branch
 function git_assert_branch_in_sync {
   local branch
-  branch=$(run git rev-parse --abbrev-ref HEAD)
   # TODO: When git 2.22 popular, change to:
   # branch=$(git branch --show-current)
+  branch=$(run git rev-parse --abbrev-ref HEAD)
+  log_callout "Verify the current branch '${branch}' is clean"
   if [[ $(run git status --porcelain --untracked-files=no) ]]; then
     log_error "The workspace in '$(pwd)' for branch: ${branch} has uncommitted changes"
     log_error "Consider cleaning up / renaming this directory or (cd $(pwd) && git reset --hard)"
     return 2
   fi
+  log_callout "Verify the current branch '${branch}' is in sync with the 'origin/${branch}'"
   if [ -n "${branch}" ]; then
     ref_local=$(run git rev-parse "${branch}")
     ref_origin=$(run git rev-parse "origin/${branch}")