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/cluster-manager/lens-views.ts

@@ -50,6 +50,7 @@ export async function initView(clusterId: ClusterId) {
   const parentElem = document.getElementById("lens-views");
   const iframe = document.createElement("iframe");
 
+  iframe.id = `cluster-frame-${cluster.id}`;
   iframe.name = cluster.contextName;
   iframe.setAttribute("src", getClusterFrameUrl(clusterId));
   iframe.addEventListener("load", () => {