Add managed module `planetscale/vitess`

[smallsamantha]

Mandatory

Where is the source code for the Managed Module?

https://github.com/planetscale/vitess-types

Do the proto files declare a package?

Yes, example https://github.com/planetscale/vitess-types/blob/main/src/vitess/vttime/v18/vttime.proto#L22

Optional

Does this module have other module dependencies/imports?

Based on the repository's release process, do you prefer syncing by releases (semver) or by git commit SHA?

Additionally, is there a sensible initial reference to sync from?

Do you think this module is widely used by the community, and is not already provided on the BSR by the owners?

Unsure? Let's chat!

[unmultimedio]

This module is already being pushed to the BSR: https://buf.build/planetscale/vitess, here the buf.yaml: https://github.com/planetscale/vitess-types/blob/770e14433716a816905f267650191319f7d0515b/src/buf.yaml#L2

The owners have set up a GHA to sync main and non-main branches to the BSR: https://github.com/planetscale/vitess-types/blob/770e14433716a816905f267650191319f7d0515b/.github/workflows/publish.yml#L13

We want to have this module synced for all BSR clusters, including the public BSR? If so, we'd need to disable/ask the owners to disable such GHA.

For now I'll start making some progress on getting the CAS data here.

[unmultimedio]

Started fetching references from latest commit atm: 770e14433716a816905f267650191319f7d0515b in #365. I will test this in a private test instance, and when that's successful we can ask the owners to turn off their GHA so we can start syncing this from other BSR instances.

[unmultimedio]

Dropped from managed modules, since it's not required to be managed anymore.