Pin setup-envtest at working commit to unblock content provider

See openstack-k8s-operators/openstack-operator#723 (comment)

Signed-off-by: Fabricio Aguiar <[email protected]>

Makefile

@@ -274,7 +274,7 @@ $(CRD_MARKDOWN): $(LOCALBIN)
 .PHONY: envtest
 envtest: $(ENVTEST) ## Download envtest-setup locally if necessary.
 $(ENVTEST): $(LOCALBIN)
-	test -s $(LOCALBIN)/setup-envtest || GOBIN=$(LOCALBIN) go install sigs.k8s.io/controller-runtime/tools/setup-envtest@latest
+	test -s $(LOCALBIN)/setup-envtest || GOBIN=$(LOCALBIN) go install sigs.k8s.io/controller-runtime/tools/setup-envtest@c7e1dc9b
 
 .PHONY: operator-sdk
 OPERATOR_SDK ?= $(LOCALBIN)/operator-sdk