Bug 1636271 - [taskgraph] Move 'optimize-strategies' from try_task_config.json to a parameter, r=tomprince

Differential Revision: https://phabricator.services.mozilla.com/D79704

taskcluster/taskgraph/parameters.py

@@ -79,6 +79,7 @@ base_schema = Schema({
     Required('message'): text_type,
     Required('moz_build_date'): text_type,
     Required('next_version'): Any(None, text_type),
+    Required('optimize_strategies'): Any(None, text_type),
     Required('optimize_target_tasks'): bool,
     Required('owner'): text_type,
     Required('phabricator_diff'): Any(None, text_type),
@@ -161,6 +162,7 @@ class Parameters(ReadOnlyDict):
             'message': '',
             'moz_build_date': six.ensure_text(now.strftime("%Y%m%d%H%M%S")),
             'next_version': None,
+            'optimize_strategies': None,
             'optimize_target_tasks': True,
             'owner': 'nobody@mozilla.com',
             'phabricator_diff': None,