Swap from Circle CI to Github actions

[carkod]

Done

Swap Circle CI to Github actions

QA

• Github actions checks should turn green: lint build

• Circle CI build error happens because the Circle CI files have been removed but webhook has not been removed yet, to avoid blocking possible urgent PRs

[webteam-app]

Starting demo at: https://global-nav-canonical-web-and-design-pr-150.run.demo.haus/