Run optim benchmarks on new runner (#2556)

Summary:
Workflow has been failing due to runner migration, this should be the right one now.

Pull Request resolved: #2556

Reviewed By: kit1980

Differential Revision: D67161443

Pulled By: janeyx99

fbshipit-source-id: 6b46cf8b162f5081668d69bd4943729f9d165589

Author: janeyx99

.github/workflows/userbenchmark-regression-detector.yml

@@ -11,7 +11,7 @@ on:
 
 jobs:
   run-userbenchmark:
-    runs-on: [a100-runner]
+    runs-on: linux.aws.a100
     timeout-minutes: 1440 # 24 hours
     environment: docker-s3-upload
     env: