Summary: Remove docs hosting from pixie and move to netlify. It will make it easier to use their CDN.

Test Plan: Tested using dev cloud on skaffold to verify the redirects.

Reviewers: michelle, philkuz, #engineering

Reviewed By: michelle, #engineering

Differential Revision: https://phab.corp.pixielabs.ai/D5047

GitOrigin-RevId: 42f5bd8b2c3564e7ea534c5212a39d08a0bf9bdf