Increase timeout for NFR tests to 5h (#2380)

Problem: Performance tests alone take 2.5 hours.

Solution: Increase the timeout to 5 hours

tests/Makefile

@@ -122,7 +122,7 @@ stop-longevity-test: nfr-test ## Stop the longevity test and collects results
 .PHONY: .vm-nfr-test
 .vm-nfr-test: ## Runs the NFR tests on the GCP VM (called by `nfr-test`)
 	go run github.com/onsi/ginkgo/v2/ginkgo --randomize-all --randomize-suites --keep-going --fail-on-pending --trace -r -v --buildvcs --force-newlines $(GITHUB_OUTPUT) \
-		--label-filter "nfr" $(GINKGO_FLAGS) --timeout 3h ./suite --  --gateway-api-version=$(GW_API_VERSION) \
+		--label-filter "nfr" $(GINKGO_FLAGS) --timeout 5h ./suite --  --gateway-api-version=$(GW_API_VERSION) \
 		--gateway-api-prev-version=$(GW_API_PREV_VERSION) --image-tag=$(TAG) --version-under-test=$(NGF_VERSION) \
 		--plus-enabled=$(PLUS_ENABLED) --ngf-image-repo=$(PREFIX) --nginx-image-repo=$(NGINX_PREFIX) --nginx-plus-image-repo=$(NGINX_PLUS_PREFIX) \
 		--pull-policy=$(PULL_POLICY) --service-type=$(GW_SERVICE_TYPE) \