Chore: Update typescript to v4.2.4 (#33297)

* Update typescript to v4.2.4

* Update @types/slate

* Fix QueryVariableEditor.test.tsx

* Fix search-related type errors

* Fix Plugin pages type errors

* Fix missing initializer errors

* Update snapshot

* Revert tsconfig changes

packages/jaeger-ui-components/package.json

@@ -11,7 +11,7 @@
   "devDependencies": {
     "enzyme": "^3.8.0",
     "enzyme-adapter-react-16": "^1.2.0",
-    "typescript": "4.1.2"
+    "typescript": "4.2.4"
   },
   "dependencies": {
     "@emotion/react": "11.1.5",