fix: Revert "Replace client-oauth2 with an in-repo package" (no-changelog) (#6265)

Revert "feat(core): Replace client-oauth2 with an in-repo package (#6056)"

This reverts commit 77ac953eaf.

packages/cli/package.json

@@ -117,7 +117,6 @@
   },
   "dependencies": {
     "@n8n_io/license-sdk": "~2.4.0",
-    "@n8n/client-oauth2": "workspace:*",
     "@oclif/command": "^1.8.16",
     "@oclif/core": "^1.16.4",
     "@oclif/errors": "^1.3.6",
@@ -134,6 +133,7 @@
     "change-case": "^4.1.1",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.0",
+    "client-oauth2": "^4.2.5",
     "compression": "^1.7.4",
     "connect-history-api-fallback": "^1.6.0",
     "convict": "^6.2.4",