shard testgrid config

[spiffxp]

What should be cleaned up or changed:
Similar to how we have sharded up job configs by owning SIG to enable better self-service, let's shard up testgrid configs by owning SIG.

Provide any links for context:
Work has already started on this, linking relevant PR's:

• Testgrid Configuration Sharding #13472 (initial impl)
• Revert "Merge pull request #13472 from chases2/kirby-and-the-testgrid… #13530 (revert)
• Fix to Branch Protector's Prow Job Dir #13539 (bugfix)

/area testgrid
/area config
/milestone v1.16
/priority important-soon
/assign @chases2

[spiffxp]

/assign @michelle192837

[spiffxp]

/milestone v1.16

[chases2]

Our current system is now configured to take a directory tree at /config/testgrids, allowing us to split these files into any number of arbitrary, smaller files.

Edit: Sharding by owning SIGs is a good idea and metric; let's use this issue to track progress on that.

[chases2]

What goes where is going to vary by SIG, so we'll need to get them involved in the process.

Sharding for a SIG can be done similarly to #13609:

1. Remove the appropriate Dashboard Groups and Dashboards from the central file
2. Put them in any file in the /config/testgrids directory tree. Subdirectories are fine, and encouraged in moderation, since OWNERS files can be nested in this way.

/help

[k8s-ci-robot]

@chases2:
This request has been marked as needing help from a contributor.

Please ensure the request meets the requirements listed here.

If this request no longer meets these requirements, the label can be removed
by commenting with the /remove-help command.

In response to this:

What goes where is going to vary by SIG, so we'll need to get them involved in the process.

Sharding for a SIG can be done similarly to #13609:

1. Remove the appropriate Dashboard Groups and Dashboards from the central file
2. Put them in any file in the /config/testgrids directory tree. Subdirectories are fine, and encouraged in moderation, since OWNERS files can be nested in this way.

/help

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[spiffxp]

I've attempted to model what sharding to sig-owned dirs would look like, using the sig-testing and sig-contribex testgrids: #13720