chore: disable codeflow for pull requests (#28101)

Issue number: N/A

---------

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## What is the current behavior?
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Team isn't using the integration. 

## What is the new behavior?
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this PR. -->

- Disables the Codeflow integration on pull requests

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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Author: sean-perkins

.stackblitz/codeflow.json

@@ -4,7 +4,7 @@
       "enabled": false
     },
     "pullRequests": {
-      "enabled": true
+      "enabled": false
     }
   }
 }