revert: feat(cdk): update tsconfig to more modern settings in typescript init templates (#31953)

This reverts #31927

There are some TypeScript init tests failed. Revert the change for now so that it doesn't block the release.

Will investigate why those test failed.

### Issue # (if applicable)

Closes #<issue number here>.

### Reason for this change



### Description of changes



### Description of how you validated changes



### Checklist
- [ ] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: xazhao

packages/aws-cdk/lib/init-templates/app/typescript/tsconfig.json

@@ -1,13 +1,17 @@
 {
   "compilerOptions": {
-    "target": "ES2022",
+    "target": "ES2020",
     "module": "commonjs",
     "lib": [
-      "ES2023",
+      "es2020",
       "dom"
     ],
     "declaration": true,
     "strict": true,
+    "noImplicitAny": true,
+    "strictNullChecks": true,
+    "noImplicitThis": true,
+    "alwaysStrict": true,
     "noUnusedLocals": false,
     "noUnusedParameters": false,
     "noImplicitReturns": true,

packages/aws-cdk/lib/init-templates/sample-app/typescript/tsconfig.json

@@ -1,13 +1,17 @@
 {
   "compilerOptions": {
-    "target": "ES2022",
+    "target": "ES2020",
     "module": "commonjs",
     "lib": [
-      "ES2023",
+      "es2020",
       "dom"
     ],
     "declaration": true,
     "strict": true,
+    "noImplicitAny": true,
+    "strictNullChecks": true,
+    "noImplicitThis": true,
+    "alwaysStrict": true,
     "noUnusedLocals": false,
     "noUnusedParameters": false,
     "noImplicitReturns": true,