Add OM test infrastructure

Include mom.mk from build-machinery-go to enable OM testing targets:
- make test-operator-integration: Runs OM tests and validates output
- make update-test-operator-integration: Updates expected test output

Note: Test scenarios in test-data/apply-configuration/ can be added
once apply-configuration command is fully implemented.

Generated with Claude Code

Author: bertinatto

Makefile

@@ -7,6 +7,7 @@ include $(addprefix ./vendor/github.com/openshift/build-machinery-go/make/, \
 	targets/openshift/images.mk \
 	targets/openshift/deps.mk \
 	targets/openshift/operator/telepresence.mk \
+	targets/openshift/operator/mom.mk \
 )
 
 # Exclude e2e tests from unit testing