Update build infrastructure for isolated test module

Updates Makefile, Dockerfile, and .gitignore to work with the new
test extension module location.

Makefile changes:
- Added TESTS_EXT_DIR and TESTS_EXT_OUTPUT variables
- tests-ext-build now builds from test/extended/tests-extension/
- tests-ext-update runs from and updates metadata in tests-extension dir
- Binary output: test/extended/tests-extension/openshift-apiserver-tests-ext

Dockerfile changes:
- Updated gzip path: test/extended/tests-extension/openshift-apiserver-tests-ext
- Updated COPY path for .gz file to match new location

.gitignore changes:
- Updated to ignore binary at new path: /test/extended/tests-extension/openshift-apiserver-tests-ext

The build process now:
1. cd into test/extended/tests-extension/ (where the separate go.mod is)
2. Build the binary using the isolated dependencies
3. Output binary stays within the test module directory
4. Docker build references the new paths for gzip and copy operations

Author: gangwgr

.gitignore

@@ -1,4 +1,4 @@
 /openshift-apiserver
 /_output
 .idea
-/openshift-apiserver-tests-ext
+/test/extended/tests-extension/openshift-apiserver-tests-ext

Makefile

@@ -14,6 +14,8 @@ IMAGE_REGISTRY?=registry.svc.ci.openshift.org
 # OpenShift Tests Extension (OpenShift API Server)
 # -------------------------------------------------------------------
 TESTS_EXT_BINARY := openshift-apiserver-tests-ext
+TESTS_EXT_DIR := ./test/extended/tests-extension
+TESTS_EXT_OUTPUT := $(TESTS_EXT_DIR)/$(TESTS_EXT_BINARY)
 TESTS_EXT_PACKAGE := ./cmd/openshift-apiserver-tests-ext
 
 TESTS_EXT_GIT_COMMIT := $(shell git rev-parse --short HEAD)
@@ -59,6 +61,7 @@ verify:
 # -------------------------------------------------------------------
 .PHONY: tests-ext-build
 tests-ext-build:
+	cd $(TESTS_EXT_DIR) && \
 	GOOS=$(GOOS) GOARCH=$(GOARCH) GO_COMPLIANCE_POLICY=exempt_all CGO_ENABLED=0 \
 	go build -o $(TESTS_EXT_BINARY) -ldflags "$(TESTS_EXT_LDFLAGS)" $(TESTS_EXT_PACKAGE)
 
@@ -67,7 +70,7 @@ tests-ext-build:
 # -------------------------------------------------------------------
 .PHONY: tests-ext-update
 tests-ext-update: tests-ext-build
-	./$(TESTS_EXT_BINARY) update
-	for f in .openshift-tests-extension/*.json; do \
-		jq 'map(del(.codeLocations))' "$f" > tmpp && mv tmpp "$f"; \
+	cd $(TESTS_EXT_DIR) && ./$(TESTS_EXT_BINARY) update
+	for f in $(TESTS_EXT_DIR)/.openshift-tests-extension/*.json; do \
+		jq 'map(del(.codeLocations))' "$$f" > tmpp && mv tmpp "$$f"; \
 	done

images/Dockerfile.rhel

@@ -3,11 +3,11 @@ WORKDIR /go/src/github.com/openshift/openshift-apiserver
 COPY . .
 RUN make build --warn-undefined-variables \
     && make tests-ext-build \
-    && gzip openshift-apiserver-tests-ext
+    && gzip test/extended/tests-extension/openshift-apiserver-tests-ext
 
 FROM registry.ci.openshift.org/ocp/4.21:base-rhel9
 COPY --from=builder /go/src/github.com/openshift/openshift-apiserver/openshift-apiserver /usr/bin/
-COPY --from=builder /go/src/github.com/openshift/openshift-apiserver/openshift-apiserver-tests-ext.gz /usr/bin/
+COPY --from=builder /go/src/github.com/openshift/openshift-apiserver/test/extended/tests-extension/openshift-apiserver-tests-ext.gz /usr/bin/
 ENTRYPOINT ["/usr/bin/openshift-apiserver"]
 LABEL io.k8s.display-name="OpenShift API Server Command" \
       io.k8s.description="OpenShift is a platform for developing, building, and deploying containerized applications." \