feat: migrate GCP account and update cluster

[agaudreault]

This PR migrates the stack the cluster to a new GCP account.

Current account owners: @leoluz and @agaudreault

Changes:

• Add infrastructure as code for the GCP account
• Update several apps
• Remove jenkins app
• Add external-dns to manage the new apps.argoproj.io zone.

Future work

• Some configurations are added manually, mostly secrets (Manage secrets as code #29)
  • Use SealedSecrets to manage the secrets as code
• argoproj.io DNS zones need to be migrated to the new GCP account and added to the infra as code. (Infra: Manage all DNS zones in argoproj.io #30)
  • Need to move all records outside of apps.argoproj.io, and ultimately infrastructure serving it.
  • The domain needs to be configured accordingly. This will require more sync with the CNCF
• Current admin team config from argoproj is outdated so admin cannot login with the Github auth. (Cannot login as admin for CD and Workflow #31)
  • Need to create/update the admin team in https://github.com/orgs/argoproj/teams.
• Applications are applied manually in the cluster. (Use Apps-of-Apps pattern to manage cluster #32)
  • The apps-of-apps pattern could be used
• Infrastructure as code has a user-access module to explicitly define the permissions. This gives permissions to users based on their personal gmail. Some concerns have been raised about having this information in the code. (Infra: manage cluster access from an external data source #33)
  • Use a data source that will hold the users emails or use google groups
• Migrate all other resources and delete old project (Migrate all resources out of old GCP account #34)
  • Before deleting the old GCP project, all resources needs to be migrated to the infra as code
• CI pipeline to detect terraform change
• Add more documentation on how to maintain/update the infrastructure and the different components
• Need to update codeowners to review infrastructure changes
  • Create a github team?

[leoluz]

Please check my comments.

[leoluz]

We should probably remove this for now until we decide how the ownership is going to be defined for the repo.

[agaudreault]

👍 I commented it for now to keep track of infrastructure related files.

[leoluz]

LGTM

[tooptoop4]

@leoluz @agaudreault https://workflows.apps.argoproj.io/workflows/argo still no bueno