controller: removes sink implementation (#364)

**Commit Message**

This removes the config sink style implementation of controller.
Previously, there the config sink was used as a central place to do the
mutation that involves multiple resources. However, it unnecessarily
comes with the complexity and this simplifies the implementation by
removing it.

Majority of the changes are code moving, especially moving the resource
mutation code from sink to under AIGatewayRoute controller.

This was brought up in the conversation with @sanposhiho and more follow
up PRs will come to polish the implementation.

---------

Signed-off-by: Takeshi Yoneda <t.y.mathetake@gmail.com>

.golangci.yml

@@ -60,6 +60,10 @@ linters-settings:
         alias: mcsapiv1a1
       - pkg: k8s.io/api/(\w+)/(v[\w\d]+)
         alias: $1$2
+      - pkg: k8s.io/apimachinery/pkg/api/errors
+        alias: apierrors
+      - pkg: github.com/envoyproxy/ai-gateway/internal/testing
+        alias: internaltesting
   gci:
     sections:
       # Captures all standard packages if they do not match another section.

Makefile

@@ -25,7 +25,7 @@ HELM_CHART_VERSION ?= v0.0.0-latest
 
 # Arguments for go test. This can be used, for example, to run specific tests via
 # `GO_TEST_ARGS="-run TestName/foo/etc -v -race"`.
-GO_TEST_ARGS ?= -v -race
+GO_TEST_ARGS ?= -race
 # Arguments for go test in e2e tests in addition to GO_TEST_ARGS, applicable to test-e2e, test-extproc, and test-controller.
 GO_TEST_E2E_ARGS ?= -count=1
 
@@ -151,7 +151,7 @@ test-extproc: build.extproc
 	@$(MAKE) build.extproc_custom_router CMD_PATH_PREFIX=examples
 	@$(MAKE) build.testupstream CMD_PATH_PREFIX=tests/internal/testupstreamlib
 	@echo "Run ExtProc test"
-	@go test ./tests/extproc/... $(GO_TEST_ARGS) $(GO_TEST_E2E_ARGS) -tags test_extproc -v
+	@go test ./tests/extproc/... $(GO_TEST_ARGS) $(GO_TEST_E2E_ARGS) -tags test_extproc
 
 # This runs the end-to-end tests for the controller with EnvTest.
 .PHONY: test-controller

go.mod

@@ -25,7 +25,6 @@ require (
 	k8s.io/apiextensions-apiserver v0.32.2
 	k8s.io/apimachinery v0.32.2
 	k8s.io/client-go v0.32.2
-	k8s.io/klog/v2 v2.130.1
 	k8s.io/utils v0.0.0-20241210054802-24370beab758
 	sigs.k8s.io/controller-runtime v0.20.2
 	sigs.k8s.io/gateway-api v1.2.1
@@ -374,6 +373,7 @@ require (
 	k8s.io/apiserver v0.32.2 // indirect
 	k8s.io/cli-runtime v0.32.1 // indirect
 	k8s.io/component-base v0.32.2 // indirect
+	k8s.io/klog/v2 v2.130.1 // indirect
 	k8s.io/kube-openapi v0.0.0-20241212222426-2c72e554b1e7 // indirect
 	k8s.io/kubectl v0.32.1 // indirect
 	mvdan.cc/gofumpt v0.7.0 // indirect