ci(vagrant-build): Use c8i.4xlarge instead of c5n.metal instance type if RunsOn runners.

Author: yuravk

.github/workflows/vagrant-build.yml

@@ -155,7 +155,7 @@ jobs:
     runs-on: >-
       ${{
         github.repository_owner == 'AlmaLinux' &&
-          format('runs-on={0}/family=c7i.metal-24xl+c7a.metal-48xl+*8gd.metal*/image=ubuntu24-full-x64', github.run_id)
+          format('runs-on={0}/family=c8i.4xlarge/image=ubuntu24-full-x64/nested-virt', github.run_id)
         ||
         'ubuntu-24.04'
       }}
@@ -253,7 +253,7 @@ jobs:
     runs-on: >-
       ${{
         github.repository_owner == 'AlmaLinux' &&
-          format('runs-on={0}/family=c5n.metal/ami={1}', github.run_id, vars.EC2_AMI_ID_AL9_X86_64)
+          format('runs-on={0}/family=c8i.4xlarge/ami={1}/nested-virt', github.run_id, vars.EC2_AMI_ID_AL9_X86_64)
         ||
         inputs.self_hosted_runner == 'aws-ec2' && github.run_id
         ||