Envoy Gateway support

[eguzki]

What

Envoy Gateway Support

Closes #325

[codecov]

Codecov Report

Attention: Patch coverage is 75.23992% with 258 lines in your changes missing coverage. Please review.

Project coverage is 78.65%. Comparing base (ece13e8) to head (2a80537).
Report is 187 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/envoygateway/mutators.go	36.11%	28 Missing and 18 partials ⚠️
...llers/envoygateway_limitador_cluster_controller.go	75.60%	20 Missing and 10 partials ⚠️
controllers/envoygateway_wasm_controller.go	82.30%	13 Missing and 10 partials ⚠️
...s/envoysecuritypolicy_referencegrant_controller.go	75.86%	14 Missing and 7 partials ⚠️
...llers/authpolicy_envoysecuritypolicy_controller.go	86.04%	12 Missing and 6 partials ⚠️
...authpolicy_istio_authorizationpolicy_controller.go	77.21%	12 Missing and 6 partials ⚠️
...library/mappers/envoysecuritypolicy_to_kuadrant.go	37.50%	10 Missing and 5 partials ⚠️
pkg/kuadranttools/topology_tools.go	77.77%	7 Missing and 7 partials ⚠️
pkg/istio/mutators.go	45.83%	8 Missing and 5 partials ⚠️
pkg/library/mappers/httproute_to_kuadrant.go	63.63%	8 Missing and 4 partials ⚠️
... and 7 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #859      +/-   ##
==========================================
- Coverage   80.20%   78.65%   -1.56%     
==========================================
  Files          64       91      +27     
  Lines        4492     7046    +2554     
==========================================
+ Hits         3603     5542    +1939     
- Misses        600     1090     +490     
- Partials      289      414     +125     

Flag	Coverage Δ
bare-k8s-integration	5.11% <9.50%> (?)
controllers-integration	70.71% <73.99%> (?)
envoygateway-integration	46.92% <62.28%> (?)
gatewayapi-integration	10.78% <9.59%> (?)
integration	?
istio-integration	50.27% <26.48%> (?)
unit	27.75% <3.31%> (-2.28%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
api/v1beta1 (u)	38.46% <0.00%> (-32.97%)	⬇️
api/v1beta2 (u)	74.10% <63.82%> (-17.33%)	⬇️
pkg/common (u)	88.13% <ø> (-0.70%)	⬇️
pkg/istio (u)	70.95% <ø> (-2.96%)	⬇️
pkg/log (u)	94.73% <ø> (ø)
pkg/reconcilers (u)	∅ <ø> (∅)
pkg/rlptools (u)	84.26% <ø> (+4.81%)	⬆️
controllers (i)	80.43% <80.17%> (+3.63%)	⬆️

Files with missing lines	Coverage Δ
controllers/authpolicy_controller.go	84.21% <ø> (+3.50%)	⬆️
controllers/kuadrant_status.go	75.86% <100.00%> (+4.56%)	⬆️
...llers/rate_limiting_istio_wasmplugin_controller.go	70.87% <100.00%> (ø)
controllers/test_common.go	100.00% <100.00%> (ø)
pkg/istio/mesh_config.go	67.51% <100.00%> (+1.80%)	⬆️
pkg/istio/utils.go	79.16% <100.00%> (ø)
pkg/library/gatewayapi/topology.go	81.73% <100.00%> (ø)
pkg/library/gatewayapi/topology_indexes.go	93.06% <100.00%> (ø)
pkg/library/kuadrant/kuadrant.go	85.29% <ø> (-14.71%)	⬇️
pkg/rlptools/utils.go	100.00% <100.00%> (ø)
... and 17 more

... and 35 files with indirect coverage changes

[eguzki]

@adam-cattermole I have added some doc. I would appreciate some review and grammar check. Any suggestion welcome.

[adam-cattermole]

I've had a chance to go through all the changes and I think it's looking good. Perhaps we want another reviewer external to the changes but I'll leave that up to you