ci: add pull request triage and Kodiak merge workflow (#9109)

* chore: enable kodiak for auto merges

* ci: add pull request triage

* ci: update kentaro-m/auto-assign-action

This supports Node.js 16.

---------

Co-authored-by: iCrawl <buechler.noel@outlook.com>

.github/auto_assign.yml

@@ -0,0 +1,8 @@
+addReviewers: true
+reviewers:
+  - iCrawl
+  - SpaceEEC
+  - kyranet
+  - vladfrangu
+numberOfReviewers: 0
+runOnDraft: true