Revert "Update packages to fix CG alerts (#20922)" (#20927)

This reverts commit 97c070be13.

extensions/azurecore/package.json

@@ -357,13 +357,13 @@
   },
   "devDependencies": {
     "@types/keytar": "4.4.0",
-    "@types/mocha": "^9.1.1",
+    "@types/mocha": "^7.0.2",
     "@types/node": "^12.11.7",
     "@types/qs": "^6.9.1",
     "@types/request": "^2.48.1",
     "@types/sinon": "^9.0.4",
     "@types/ws": "^6.0.4",
-    "mocha": "^9.2.2",
+    "mocha": "^7.1.1",
     "should": "^13.2.1",
     "sinon": "^9.0.2",
     "typemoq": "^2.1.0",