Bug 1650406 - [ci] Use 'if-dependencies' with upload-symbols tasks r=bhearsum

Differential Revision: https://phabricator.services.mozilla.com/D87777

taskcluster/taskgraph/transforms/job/__init__.py

@@ -55,6 +55,7 @@ job_description_schema = Schema({
     Optional('dependencies'): task_description_schema['dependencies'],
     Optional('if-dependencies'): task_description_schema['if-dependencies'],
     Optional('soft-dependencies'): task_description_schema['soft-dependencies'],
+    Optional('if-dependencies'): task_description_schema['if-dependencies'],
     Optional('requires'): task_description_schema['requires'],
     Optional('expires-after'): task_description_schema['expires-after'],
     Optional('routes'): task_description_schema['routes'],

taskcluster/taskgraph/transforms/upload_symbols.py

@@ -75,7 +75,7 @@ def fill_template(config, tasks):
         # We only want to run these tasks if the build is run.
         # XXX Better to run this on promote phase instead?
         task['run-on-projects'] = dep.attributes.get('run_on_projects')
-        task['optimization'] = dep.optimization
+        task['if-dependencies'] = ['build']
 
         # clear out the stuff that's not part of a task description
         del task['primary-dependency']

taskcluster/test/test_mach_try_auto.py

@@ -86,7 +86,6 @@ def test_only_important_manifests(params, full_task_graph, filter_tasks):
         pytest.param(
             lambda t: t.kind == "build" and "fuzzing" in t.attributes["build_platform"],
             id="no fuzzing builds",
-            marks=pytest.mark.xfail,
         ),
         pytest.param(
             lambda t: t.kind == "build-signing",