migrate new hub to main branch

[kcranston]

We have deployment on a new GKE hub running on staging branch. We need to migrate this over to main (can't do a simple PR because different hubs on staging and main, and github actions are slightly different).

• [ ] set up Actions, same as staging but different branch name and do not allow direct commits
• [x] deactivate travis webhook
• [x] add new config files for ea-hub
• [ ] update Dockerfiles for ea-hub
• [x] migrate new deploy script to main from staging
• [x] update deploy script for production hub names
• [ ] documentation (migrate from staging, and add new)

[kcranston]

Checking these off as I add them to the new-cluster-workflow feature branch.

[lwasser]

@kcranston can this be closed?