[Metax][CI] fix Metax ci bug (#7920)

* Change Jenkins trigger group from APPROVAL to GZ_BD-CPU

* Change Jenkins runner to self-hosted XPU-P800

Author: plusNew001

.github/workflows/ci_metax.yml

@@ -18,8 +18,7 @@ concurrency:
 jobs:
   trigger-jenkins:
     name: Trigger Jenkins for PR
-    runs-on:
-      group: GZ_BD-CPU
+    runs-on: [self-hosted, XPU-P800]
     environment: Metax_ci
 
     steps: