[fbsync] Disable prototype tests (#8466)

Reviewed By: vmoens

Differential Revision: D58283851

fbshipit-source-id: 7cc77aeb30782ab930e82f975da75ebf9c869b1d

Author: NicolasHug

.github/workflows/prototype-tests-linux-gpu.yml

@@ -1,5 +1,8 @@
 name: Prototype tests on Linux
 
+# IMPORTANT: This workflow has been manually disabled from the GitHub interface
+# in June 2024. The file is kept for reference in case we ever put this back.
+
 on:
   pull_request: