Upgrade to electron 12 and Node 14 (#3572)

Upgrade to electron 12 and Node 14

- Compute cluster ID for tests
- Switch to temporary appData path while testing

Signed-off-by: Sebastian Malton <sebastian@malton.name>

Co-authored-by: Sebastian Malton <smalton@mirantis.com>
Co-authored-by: Jari Kolehmainen <jari.kolehmainen@gmail.com>

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-16.04, macos-10.15, windows-2019]
-        node-version: [12.x]
+        node-version: [14.x]
     steps:
       - name: Checkout Release from lens
         uses: actions/checkout@v2