Migrate deployment of our documentation site over to Netlify

[Himangini]

Short description
As a Developer I want to migrate the deployment of our documentation site over to Netlify from GCP so that
I can

• simplify the deployment process
• speed up deployment time and reduce costs
• help get rid of old version folders being served from the bucket even when they are deleted from our repository
• improve developer productivity since deploy previews over pull requests will no longer take several minutes

Acceptance criteria

• Add a new workflow for documentation deployment for Netlify
• Create and setup the documentation site over Netlify
• Setup relevant env vars, deploy keys, domains etc., for production deploys
• Make the switch seamless and avoid downtime

Design materials

• Screenshots
• Design diagrams
• WEP
• PR/FAQ

Work breakdown
(optional)Task breakdown of the work

• create X
• design X
• ...