roachtest: move generate-fixtures roachtest to test-eng ownership

Epic: none
Release note: None

pkg/cmd/roachtest/tests/fixtures.go

@@ -65,7 +65,7 @@ func registerFixtures(r registry.Registry) {
 		Timeout:          30 * time.Minute,
 		CompatibleClouds: registry.AllExceptAWS,
 		Suites:           registry.Suites(registry.Fixtures),
-		Owner:            registry.OwnerDevInf,
+		Owner:            registry.OwnerTestEng,
 		Cluster:          r.MakeClusterSpec(4),
 		Run:              runFixtures,
 	}