Add Cypress repro PR template [ci skip] (#13668)

.github/PULL_REQUEST_TEMPLATE/cypress_repro.md

+### Status
+
+PENDING CI / PENDING REVIEW / READY _(choose one and update accordingly)_
+
+### What does this PR accomplish?
+
+- Reproduces #XXXXX
+
+### How to test this manually?
+
+- `yarn test-cypress-open`
+- `relative/path/to/the/file` _(optionally, include the line number on which the test starts)_
+> _(For still unfixed bug)_
+- Replace `it.skip()` with `it.only()` to test this in isolation
+- The test should fail until the related issue is fixed
+> _(For a fixed bug)_
+- The test should pass
+
+### Additional notes:
+
+> _(For still unfixed bug)_
+- Once the issue is fixed, please remove the `.skip` part (unskip the test completely)
+- Make sure the test is passing and
+- Merge it together with the fix
+> _(For a fixed bug)_
+- Please merge this repro unskipped
+- The bug was fixed in #YYYYY
+
+### Questions:
+
+- this is optional