Bug 1772074 - [gecko_taskgraph] Ensure 'ensure_spi_disabled_on_all_but_spi' transform properly handles composite variants r=taskgraph-reviewers,jcristau

Depends on D147872

Differential Revision: https://phabricator.services.mozilla.com/D147873

taskcluster/gecko_taskgraph/test/test_transforms_test.py

@@ -283,7 +283,6 @@ def assert_spi_disabled(task):
         pytest.param(
             {"attributes": {"unittest_variant": "fission+socketprocess"}},
             assert_spi_not_disabled,
-            marks=pytest.mark.xfail,
             id="composite variant",
         ),
     ),

taskcluster/gecko_taskgraph/transforms/test/other.py

@@ -734,8 +734,7 @@ def ensure_spi_disabled_on_all_but_spi(config, tasks):
 
         if (
             all(s not in task["suite"] for s in has_no_setpref)
-            and variant != "socketprocess"
-            and variant != "socketprocess_networking"
+            and "socketprocess" not in variant
         ):
             task["mozharness"]["extra-options"].append(
                 "--setpref=media.peerconnection.mtransport_process=false"