[ACS-5991] ESLint fixes and code quality improvements (#8893)

* prefer-optional-chain: core

* prefer-optional-chain: content, fix typings

* prefer-optional-chain: process, fix typings

* prefer-optional-chain: process-cloud, fix typings, fix ts configs and eslint

* [ci: force] sonar errors fixes, insights lib

* [ci:force] fix security issues

* [ci:force] fix metadata e2e bug, js assignment bugs

* [ci:force] fix lint issue

* [ci:force] fix tests

lib/core/tsconfig.lib.json

@@ -2,6 +2,7 @@
   "extends": "./tsconfig.json",
   "compilerOptions": {
     "outDir": "../../dist/out-tsc",
+    "declaration": true,
     "declarationMap": true,
     "paths": {
       "@alfresco/adf-extensions": ["../../../dist/libs/extensions"],