limitador cluster envoy filter leverages DAG

[eguzki]

What

Limitador cluster envoy filter controller reading from DAG Gateway API topology and RateLimitPolicies

Kuadrant rate limiting controllers no longer depends on back references annotation: kuadrant.io/ratelimitpolicies. Instead, controllers rely on the DAG Gateway API topopology to read cluster state. Kuadrant envoy filter controller is also based on this approach.

Fix reconciliation event blind spots due to race conditions or timing issues. The reconciled resource reflects latest updates from the cluster (Gateways, Routes and policies).

Built on top of #527, so that must be merged first (not a hard requirement, though)

[codecov]

Codecov Report

Merging #528 (752863b) into rate-limiting-limits-controller (9f58378) will not change coverage.
The diff coverage is 0.00%.

Additional details and impacted files

@@                       Coverage Diff                        @@
##           rate-limiting-limits-controller     #528   +/-   ##
================================================================
  Coverage                            32.47%   32.47%           
================================================================
  Files                                   67       68    +1     
  Lines                                 4745     4745           
================================================================
  Hits                                  1541     1541           
  Misses                                3120     3120           
  Partials                                84       84           

Flag	Coverage Δ
unit	32.47% <0.00%> (ø)

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

Components	Coverage Δ
api/v1beta1 (u)	∅ <ø> (∅)
api/v1beta2 (u)	52.73% <ø> (+0.71%)	⬆️
pkg/common (u)	79.62% <ø> (ø)
pkg/istio (u)	44.37% <ø> (ø)
pkg/log (u)	36.84% <ø> (ø)
pkg/reconcilers (u)	∅ <ø> (∅)
pkg/rlptools (u)	50.34% <0.00%> (-6.74%)	⬇️
controllers (i)	7.82% <0.00%> (+0.09%)	⬆️

Files	Coverage Δ
api/v1beta2/ratelimitpolicy_types.go	16.98% <ø> (+0.61%)	⬆️
controllers/rate_limiting_wasmplugin_controller.go	0.00% <0.00%> (ø)
...ollers/limitador_cluster_envoyfilter_controller.go	0.00% <0.00%> (ø)
pkg/rlptools/topology_index.go	0.00% <0.00%> (ø)