Bug 1806073 - Migrate Windows 2012 workloads to Azure r=ahal,jmaher

Differential Revision: https://phabricator.services.mozilla.com/D164898

taskcluster/ci/config.yml

@@ -479,7 +479,7 @@ workers:
             provisioner: '{trust-domain}-{level}'
             implementation: generic-worker
             os: windows
-            worker-type: '{alias}'
+            worker-type: '{alias}-azure'
         image:
             provisioner: '{trust-domain}-{level}'
             implementation: docker-worker

taskcluster/gecko_taskgraph/transforms/job/spidermonkey.py

@@ -102,7 +102,7 @@ def generic_worker_spidermonkey(config, job, taskdesc):
 
     run["using"] = "run-task"
     run["command"] = [
-        "c:\\mozilla-build\\msys\\bin\\bash.exe "  # string concat
+        "c:\\mozilla-build\\msys2\\usr\\bin\\bash.exe "  # string concat
         '"./src/taskcluster/scripts/builder/%s"' % script
     ]