Allow code-quality workflow to be callable (#1026)

Reverts part of the change made in
https://github.com/mosaicml/llm-foundry/pull/1000/files#diff-4a2765c2cfcbd3804a66aab805cb92ddda74de1730923cc5bf53671d0beccf06L11

Author: b-chu

Diff for: .github/workflows/code-quality.yaml

@@ -8,6 +8,7 @@ on:
     branches:
     - main
     - release/**
+  workflow_call:
   workflow_dispatch:
 # Cancel old runs when a new commit is pushed to the same branch if not on main or dev
 concurrency: