Add prow features and plugins for Gateway API

[shaneutt]

This adds needs-triage and needs-priority for Gateway API, and also enables a couple of plugins including the cherrypicker.

Intends to resolve kubernetes-sigs/gateway-api#1800

[k8s-ci-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[shaneutt]

/cc @robscott
/cc @youngnick

[robscott]

Thanks @shaneutt!

/lgtm

[shaneutt]

Heya 👋 just checking in?

[BenTheElder]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: BenTheElder, shaneutt

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[k8s-ci-robot]

@shaneutt: Updated the plugins configmap in namespace default at cluster test-infra-trusted using the following files:

• key plugins.yaml using file config/prow/plugins.yaml

In response to this:

This adds needs-triage and needs-priority for Gateway API, and also enables a couple of plugins including the cherrypicker.

Intends to resolve kubernetes-sigs/gateway-api#1800

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