chore(refactor)!: remove deprecated CRD type bindings and clientsets

[programmer04]

What this PR does / why we need it:

Remove CRD type bindings under /pkg/apis and clientsets under /pkg/clientset that have been deprecated since 3.4.0.

Remove linters, Makefile, etc., related configs.

Document inCHANGELOG.md path to move forward for someone who may still use it.

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

• the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.2%. Comparing base (b87927a) to head (8b4400a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #7540     +/-   ##
=======================================
- Coverage   77.5%   77.2%   -0.4%     
=======================================
  Files        221     221             
  Lines      25573   25573             
=======================================
- Hits       19826   19746     -80     
- Misses      4740    4810     +70     
- Partials    1007    1017     +10     

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[pmalek]

I think that with this removal we can also get rid of

kubernetes-ingress-controller/Makefile

Lines 89 to 94 in c46527e

	CLIENT_GEN_VERSION = $(shell $(YQ) -ojson -r '.kube-code-generator' < $(TOOLS_VERSIONS_FILE))
	CLIENT_GEN = $(PROJECT_DIR)/bin/installs/kube-code-generator/$(CLIENT_GEN_VERSION)/bin/client-gen
	.PHONY: client-gen
	client-gen: mise yq ## Download client-gen locally if necessary.
	@$(MAKE) mise-plugin-install DEP=kube-code-generator
	@$(MAKE) mise-install DEP_VER=kube-code-generator@$(CLIENT_GEN_VERSION)

and

kubernetes-ingress-controller/.tools_versions.yaml

Lines 1 to 2 in 5ed1655

	# renovate: datasource=github-tags depName=kubernetes/code-generator
	kube-code-generator: "0.33.1"

Otherwise 👍