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>

src/renderer/components/+apps-helm-charts/helm-charts.tsx

@@ -96,7 +96,7 @@ export class HelmCharts extends Component<Props> {
             searchProps: {
               ...searchProps,
               placeholder: "Search Helm Charts...",
-            },
+            }
           })}
           renderTableHeader={[
             { className: "icon", showWithColumn: columnId.name },