[llvm] [Workflows] Enable commit access requests via GitHub issues (PR #100458)

[Tom Stellard via llvm-commits]

================
@@ -27,3 +27,6 @@
 
 'bolt':
   - '/\bbolt(?!\-)\b/i'
+
+'infrastructure:commit-access-request':
----------------
tstellar wrote:

I'll update the label to use the short name.  Note that if we change the name of existing lables without changing the names of the pr-subscribers or issues-subscriber teams.

https://github.com/llvm/llvm-project/pull/100458