Bug 1888309 - Run more firefox-android tasks on b-linux-medium-gcp r=jmaher,jcristau

Change build-apk, build-bundle, test-components, and test-apk to b-linux-medium-gcp, to get the same machine type used traditionally on github. Change ui-test-apk to t-linux-large, similar but smaller than what was used on github.

Differential Revision: https://phabricator.services.mozilla.com/D205937

taskcluster/android_taskgraph/transforms/build_android_app.py

@@ -38,7 +38,7 @@ def add_common_config(config, tasks):
         treeherder["kind"] = "build"
         treeherder["tier"] = 1
 
-        task["worker-type"] = "b-linux-large-gcp"
+        task["worker-type"] = "b-linux-medium-gcp"
 
         worker = task.setdefault("worker", {})
         worker["docker-image"] = {}

taskcluster/ci/test-apk/kind.yml

@@ -33,7 +33,7 @@ job-defaults:
         use-caches: false
     treeherder:
         kind: test
-    worker-type: b-linux-large-gcp
+    worker-type: b-linux-medium-gcp
     worker:
         docker-image: {in-tree: android-components}
         max-run-time: 7200

taskcluster/ci/test-components/kind.yml

@@ -44,7 +44,7 @@ job-defaults:
         kind: test
         platform: 'AC-ui-test/opt'
         tier: 2
-    worker-type: b-linux-large-gcp
+    worker-type: b-linux-medium-gcp
     worker:
         artifacts:
             - name: public

taskcluster/ci/ui-test-apk/kind.yml

@@ -22,7 +22,7 @@ job-defaults:
             - android-sdk-linux
     optimization:
         skip-unless-backstop: null
-    worker-type: b-linux-gcp
+    worker-type: t-linux-large
     worker:
         docker-image: {in-tree: android-ui-tests}
         max-run-time: 7200