KEP-4420: Retry Generate Name (#4421)

* KEP for retry generate name

* Clarify length change issues

* Apply suggestions from code review

Co-authored-by: Patrick Ohly <[email protected]>

* Apply suggestions from code review

Co-authored-by: Tim Bannister <[email protected]>

* Apply feedback

* Clarify rationale

* Fix PRR answer

* Update metric information

---------

Co-authored-by: Patrick Ohly <[email protected]>
Co-authored-by: Tim Bannister <[email protected]>

Author: 3 people

keps/prod-readiness/sig-api-machinery/4420.yaml

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+# The KEP must have an approver from the
+# "prod-readiness-approvers" group 
+# of http://git.k8s.io/enhancements/OWNERS_ALIASES
+kep-number: 4420
+alpha:
+  approver: "@deads2k"

keps/sig-api-machinery/4420-retry-generate-name/README.md

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+title: Retry Generate Name
+kep-number: 4420
+authors:
+  - "@jpbetz"
+owning-sig: sig-api-machinery
+participating-sigs:
+status: implementable
+creation-date: 2024-01-19
+reviewers:
+  - TODO
+approvers:
+  - "@deads2k"
+
+# The target maturity stage in the current dev cycle for this KEP.
+stage: alpha
+
+# The most recent milestone for which work toward delivery of this KEP has been
+# done. This can be the current (upcoming) milestone, if it is being actively
+# worked on.
+latest-milestone: "v1.30"
+
+# The milestone at which this feature was, or is targeted to be, at each stage.
+milestone:
+  alpha: "v1.30"
+  beta: "v1.31"
+  stable: "v1.32"
+
+# The following PRR answers are required at alpha release
+# List the feature gate name and the components for which it must be enabled
+feature-gates:
+  - name: NameGenerationRetries
+    components:
+      - kube-apiserver
+disable-supported: true
+
+# The following PRR answers are required at beta release
+metrics:
+  - apiserver_request_duration_seconds
+    - `generate_name_retries` label to be added