ci: use ultralarge runners; drop redundant authorize gate

workflow_dispatch already restricts manual runs to write-access contributors.

Author: Marko Vejnovic

.github/workflows/build-vmlinux.yml

@@ -11,25 +11,7 @@ concurrency:
   cancel-in-progress: false
 
 jobs:
-  authorize:
-    runs-on: ubuntu-24.04
-    steps:
-      - name: Verify the actor is a contributor
-        env:
-          GH_TOKEN: ${{ github.token }}
-          REPO: ${{ github.repository }}
-          ACTOR: ${{ github.actor }}
-        run: |
-          set -euo pipefail
-          perm="$(gh api "repos/$REPO/collaborators/$ACTOR/permission" --jq '.permission')"
-          echo "$ACTOR has '$perm' permission on $REPO"
-          case "$perm" in
-            admin|maintain|write) ;;
-            *) echo "::error::$ACTOR lacks write access; only contributors may run this workflow"; exit 1 ;;
-          esac
-
   prepare:
-    needs: authorize
     runs-on: ubuntu-24.04
     outputs:
       matrix: ${{ steps.gen.outputs.matrix }}

src/vmlinux/tasks/matrix.clj

@@ -3,7 +3,7 @@
    [cheshire.core :as json]
    [manifest :as mf]))
 
-(def ^:private arch-runner {:x86_64 "ubuntu-24.04-32core", :aarch64 "ubuntu-24.04-arm-32core"})
+(def ^:private arch-runner {:x86_64 "ultralarge-24.04-x64", :aarch64 "ultralarge-24.04-aarch64"})
 
 (defn matrix
   []