Add managed module: planetscale/vtprotobuf

[tonyli233]

Mandatory

Where is the source code for the Managed Module?

https://github.com/planetscale/vtprotobuf

Do the proto files declare a package?

Yes github.com/planetscale/vtprotobuf/vtproto,

Optional

Does this module have other module dependencies/imports?

No

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

SemVer releases.

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

No.

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

It will be used by Prometheus remote write 2.0. Prometheus is currently using gogo/proto and will migrate to protoc-gen-go and vtproto with pooling. This package is helpful for the pooling.