Sync master into 2201.9.0

[sm1990]

Purpose

$subject
Fixes #

Checklist

• Page addition

  • Add permalink to pages.

• Page removal

  • Remove entry from corresponding left nav YAML file.
  • Add redirect_from on the alternative page.
  • If no alternative page, add redirection on the redirections.js file.

• Page rename

  • Add front-matter redirect_from.
  • Add front-matter redirect_to: (if applicable).

• Page restrcuture

  • Add permalink to pages.
  • Add front-matter redirect_from.
  • Add front-matter redirect_to: (if applicable).

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
6 out of 7 committers have signed the CLA.

✅ Nuvindu
✅ sm1990
✅ HindujaB
✅ ashweni
✅ Thevakumar-Luheerathan
✅ RDPerera
❌ praneesha
_{You have signed the CLA already but the status is still pending? Let us recheck it.}