Backport vstream prs v21

[twthorn]

Description

We need to backport these PRs
https://github.com/slackhq/vitess/pulls?q=author%3Atwthorn+is%3Amerged+base%3Aslack-19.0

The last one was already in v21, so there are only 2 of the three we need to backport. Added them here.

Also add a new one that Planetscale implemented for us:

• VStream: Add flag to support copying only specific tables vitessio/vitess#18184
  Also one more we got merged
• Add a flag to vstream to exclude keyspace from table name vitessio/vitess#18274
• Add support for sending grpc server backend metrics via ORCA vitessio/vitess#18282

Related Issue(s)

Checklist

• "Backport to:" labels have been added if this change should be back-ported to release branches
• If this change is to be back-ported to previous releases, a justification is included in the PR description
• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on CI?
• Documentation was added or is not required

Deployment Notes

[salesforce-cla]

Thanks for the contribution! Before we can merge this, we need @beingnoble03 to sign the Salesforce Inc. Contributor License Agreement.

[timvaillancourt]

Thanks @twthorn

[github-actions]

This PR is being marked as stale because it has been open for 30 days with no activity. To rectify, you may do any of the following:

• Push additional commits to the associated branch.
• Remove the stale label.
• Add a comment indicating why it is not stale.

If no action is taken within 7 days, this PR will be closed.

[github-actions]

This PR was closed because it has been stale for 7 days with no activity.