ci: enable tmate when in debug mode

we don't want to wait for extra 10min once the ci passed,
so we'll add a check if `debug-ci` label is added or debug runner
is triggered from UI then only start tmate. Also, updaing the
development doc and rook test doc.

Signed-off-by: subhamkrai <srai@redhat.com>
(cherry picked from commit a223b6777b)

.github/workflows/tmate_debug/action.yml

@@ -9,6 +9,7 @@ runs:
   steps:
     - name: consider debugging
       shell: bash --noprofile --norc -eo pipefail -x {0}
+      if: runner.debug || contains(github.event.pull_request.labels.*.name, 'debug-ci')
       run: |
         # Enable tmate only in the Rook fork, where the USE_TMATE secret is set in the repo, or if the action is re-run
         if [ "$GITHUB_REPOSITORY_OWNER" = "rook" ] || [ -n "${{ inputs.use-tmate }}" ] || [ "$GITHUB_RUN_ATTEMPT" -gt 1 ]; then