Added PR template

Author: Shubha Narayanan

.github/pull_request_template.md

@@ -0,0 +1,9 @@
+<!--- PR title format: [GH#<gh-issue-id>]: <short-description-of-the-pr> --->
+
+<!--- If your changes apply to the latest release and/or in-development version of OpenShift, open your PR against the `main` branch.--->
+
+Issue:
+<!--- Add a link to the GitHub issue, if applicable. --->
+
+Additional information:
+<!--- Optional: Include additional context or expand the description here.--->