Switch to github hosted runners for host image promote

Author: jovial

.github/workflows/overcloud-host-image-promote.yml

@@ -33,7 +33,7 @@ jobs:
   overcloud-host-image-promote:
     name: Promote overcloud host image
     if: github.repository == 'stackhpc/stackhpc-kayobe-config'
-    runs-on: [self-hosted, stackhpc-kayobe-config-kolla-builder]
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
         with: