fix: add type meta when saving them to cache and reference indexer

[randmonkey]

What this PR does / why we need it:

The PR sets type meta for objects when adding them to cache stores and reference indexers, and fetching objects referred by when the object gets deleted. This PR is added because cache indexers to store reference relations needs object kind(GVK) for indexing, and this comes from TypeMeta of the k8s resource.
If we do not set the TypeMeta, the object kind of objects are always empty so we could not find them correctly in reference indexers.
It also adds logs when setting or deleting reference relations between objects.
Which issue this PR fixes:

fixes #3201

Special notes for your reviewer:

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

Patch coverage: 59.7% and project coverage change: +0.1% 🎉

Comparison is base (832a7aa) 67.8% compared to head (e4637f3) 67.9%.
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #4663     +/-   ##
=======================================
+ Coverage   67.8%   67.9%   +0.1%     
=======================================
  Files        164     164             
  Lines      19130   19281    +151     
=======================================
+ Hits       12972   13095    +123     
- Misses      5388    5418     +30     
+ Partials     770     768      -2     

Files Changed	Coverage Δ
internal/admission/utils.go	0.0% <ø> (ø)
...ion/validation/consumers/credentials/validation.go	32.9% <ø> (ø)
internal/admission/validation/gateway/httproute.go	70.0% <ø> (ø)
internal/admission/validation/ingress/ingress.go	0.0% <ø> (ø)
internal/admission/validator.go	37.9% <0.0%> (ø)
internal/dataplane/kongstate/kongstate.go	73.7% <ø> (ø)
internal/controllers/reference/reference.go	50.5% <44.4%> (+17.2%)	⬆️
...trollers/configuration/zz_generated_controllers.go	34.6% <50.0%> (+1.0%)	⬆️
internal/store/store.go	61.8% <56.4%> (+<0.1%)	⬆️
internal/controllers/gateway/gateway_controller.go	57.3% <100.0%> (+1.4%)	⬆️
... and 4 more

... and 4 files with indirect coverage changes

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[rainest]

referrer and referent are hard to distinguish in logs on a quick glance, but whatever.

For posterity, there's a workaround for this problem that doesn't require specifying the type in the template, but no obvious reason to use it over the template values at this point.