Add Gateway API CRDs to controller test data (#340)

The PR #335 is adding controller tests for the HTTP route which means it
needs the CRDs. So simplify future testing work we will vendor the CRDs
from the release inside of the testdata directory. This is setup so that
changes to the GW API version will force generate to be run again.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Chores**
* Updated the generated Gateway API artifacts used in the build pipeline
to ensure the latest `standard-install.yaml` content is bundled.
* Kept the bundled Gateway API version synchronized automatically by
deriving it from the project’s module version and regenerating the asset
when dependencies change.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Makefile

@@ -15,7 +15,7 @@ IMG_TAG ?= dev
 IMG_REF := $(IMG_REGISTRY)/$(IMG_REPOSITORY):$(IMG_TAG)
 
 .PHONY: generate
-generate: api/v1/zz_generated.deepcopy.go api/v1alpha1/zz_generated.deepcopy.go pkg/applyconfigurations config/crd/bases charts/netbird-operator/crds docs/api-reference.md
+generate: api/v1/zz_generated.deepcopy.go api/v1alpha1/zz_generated.deepcopy.go pkg/applyconfigurations config/crd/bases charts/netbird-operator/crds docs/api-reference.md internal/controller/testdata/crd/gateway-api.yaml
 
 api/v1/zz_generated.deepcopy.go api/v1alpha1/zz_generated.deepcopy.go: $(shell find api -not -name 'zz_generated*') hack/boilerplate.go.txt
 	@go tool controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."
@@ -36,6 +36,10 @@ charts/netbird-operator/crds: $(GENERATED_CRDS)
 docs/api-reference.md: $(shell find api) docs/.crd-ref-docs.yaml
 	@go tool crd-ref-docs --log-level error --output-path docs/api-reference.md --renderer markdown --source-path api/v1alpha1 --config docs/.crd-ref-docs.yaml
 
+GATEWAY_API_VERSION = $(shell go list -m -f '{{.Version}}' sigs.k8s.io/gateway-api)
+internal/controller/testdata/crd/gateway-api.yaml: go.mod
+	@curl -L https://github.com/kubernetes-sigs/gateway-api/releases/download/$(GATEWAY_API_VERSION)/standard-install.yaml -o internal/controller/testdata/crd/gateway-api.yaml
+
 .PHONY: lint
 lint:
 	@golangci-lint run ./...