Pin setup-envtest at working commit to fix functional tests

kubernetes-sigs/controller-runtime#2693
broke
the functional tests running downstream with following issue[1]

In order to unblock the CI, we are pinning
sigs.k8s.io/controller-runtime/tools/setup-envtest at previous working
commit[2]

Links:
[1]. kubernetes-sigs/controller-runtime#2720
[2]. kubernetes-sigs/controller-runtime@c7e1dc9

Signed-off-by: Chandan Kumar <raukadah@gmail.com>

Makefile

@@ -225,7 +225,7 @@ $(CONTROLLER_GEN): $(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: ginkgo
 ginkgo: $(GINKGO) ## Download ginkgo locally if necessary.