Promote GEP 3171 - Percentage Based Request mirroring to standard

[LiorLieberman]

/kind cleanup
/kind documentation

What this PR does / why we need it:
Promote Percentage Based Request mirroring to standard

Does this PR introduce a user-facing change?:

promote percentage-based-request-mirroring to standard

[LiorLieberman]

/retest

[LiorLieberman]

Constantly failed. I did not have time to look deeper, if anyone has any quick hint it may help merging this by the requested timeline.
/cc @robscott

[dprotaso]

I'm running ./hack/update-codegen.sh on your PR and getting changes that match what's in main

Curious why there's a drift in your environment

[dprotaso]

Note: this other PR of mine didn't flag this - #3632

[BenTheElder]

You should pin the go version https://go.dev/doc/toolchain, so gofmt is consistent.

It looks like this repo more or less has one module, so you can use toolchain in go.mod

[robscott]

Thanks @LiorLieberman!

For the record, this PR was ready before the deadline but codegen was failing for reasons out of Lior's control (more on that later).

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[BenTheElder]

#3652 should resolve codegen

[robscott]

/hold cancel