Docs: route rule name

[guicassolato]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

• Moves GEP-995: Named route rules to Experimental
• Fixes the description of the format for route rule names in the GEP
• Documents the name field of route rule types in the Reference > API Types section of the website

Which issue(s) this PR fixes:

Fixes #3298

Does this PR introduce a user-facing change?:

Add documentation for route rule names

[k8s-ci-robot]

Hi @guicassolato. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[robscott]

Thanks @guicassolato!

/ok-to-test
/approve
/hold for v1.2 release

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: guicassolato, robscott

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• OWNERS [robscott]

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[guicassolato]

/retest

[youngnick]

/lgtm

thanks @guicassolato!

[youngnick]

/lgtm

[youngnick]

/unhold