Remove 'issue required' check from CI (project-chip#22934)

* Remove requirement for a issue in PRs

* Update the pull request template to not directly require a issue number anymore

Author: andy31415

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,12 @@
-#### Issue Being Resolved
-* Fixes #12345 (exactly like this, so this PR is associated with an issue)
+> !!!!!!!!!! Please delete the instructions below and replace with PR desription
+>
+> If you have an issue number, please use a syntax of
+> `Fixes #12345` and a brief change description
+>
+> If you do not have an issue number, please have a good description of
+> the problem and the fix. Help the reviewer understand what to expect.
+>
+> Make sure you delete these instructions (to prove you have read them).
+>
+> !!!!!!!!!! Instructions end
 
-#### Change overview
-What's in this PR