Implement annotation validation (#9673)

* Add validation to all annotations

* Add annotation validation for fcgi

* Fix reviews and fcgi e2e

* Add flag to disable cross namespace validation

* Add risk, flag for validation, tests

* Add missing formating

* Enable validation by default on tests

* Test validation flag

* remove ajp from list

* Finalize validation changes

* Add validations to CI

* Update helm docs

* Fix code review

* Use a better name for annotation risk

internal/ingress/annotations/loadbalancing/main_test.go

@@ -38,7 +38,8 @@ func TestParse(t *testing.T) {
 		annotations map[string]string
 		expected    string
 	}{
-		{map[string]string{annotation: "ip_hash"}, "ip_hash"},
+		{map[string]string{annotation: "ewma"}, "ewma"},
+		{map[string]string{annotation: "ip_hash"}, ""}, // This is invalid and should not return anything
 		{map[string]string{}, ""},
 		{nil, ""},
 	}