[AMD] Temporarily reduce AMD scheduled test frequency to save resource (#30534)

.github/workflows/amd-aiter-scout.yml

@@ -3,7 +3,7 @@ name: AMD AITER Scout
 on:
   schedule:
     - cron: '0 20 * * 1'   # Monday 20:00 UTC
-    - cron: '0 20 * * 4'   # Thursday 20:00 UTC
+    # - cron: '0 20 * * 4'   # Thursday 20:00 UTC (temporarily disabled)
   workflow_dispatch:
     inputs:
       aiter_ref:

.github/workflows/pr-test-amd.yml

@@ -5,7 +5,7 @@ run-name: ${{ (inputs.target_stage || inputs.target_stage_select) && (inputs.pr_
 
 on:
   schedule:
-    - cron: '0 */6 * * *' # Run every 6 hours (UTC)
+    - cron: '0 */12 * * *' # Run every 12 hours (UTC)
   pull_request:
     paths:
       - "python/**"