Use install_pts.sh for PTS on the smoke CI runner

The previous workflow step ran `apt-get install -y phoronix-test-suite`
on ubuntu-latest, which 404s on 24.04 (PTS isn't in the default
repos). Calling install_pts.sh — which we already ship for the
self-hosted runner — keeps both lanes consistent.

Also fix the .deb URL baked into install_pts.sh: the
phoronix-test-suite.com/releases/repo/pts.debian path returns 404;
the upstream GitHub release at v10.8.4 is the canonical source.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: michalharakal

.github/workflows/engine-benchmarks.yml

@@ -52,9 +52,10 @@ jobs:
           java-version: 21
 
       - name: Install Phoronix Test Suite
+        # PTS isn't in Ubuntu 24.04's default repos; install_pts.sh pulls
+        # the upstream .deb from the official GitHub release.
         run: |
-          sudo apt-get update
-          sudo apt-get install -y phoronix-test-suite
+          ./scripts/install_pts.sh
 
       - name: Build publication harness shadow jar
         env:

scripts/install_pts.sh

@@ -6,8 +6,8 @@
 # Run as the operator (uses sudo). Idempotent — safe to re-run.
 set -euo pipefail
 
-PTS_VERSION="${PTS_VERSION:-10.8.6}"
-DEB_URL="https://phoronix-test-suite.com/releases/repo/pts.debian/files/phoronix-test-suite_${PTS_VERSION}_all.deb"
+PTS_VERSION="${PTS_VERSION:-10.8.4}"
+DEB_URL="https://github.com/phoronix-test-suite/phoronix-test-suite/releases/download/v${PTS_VERSION}/phoronix-test-suite_${PTS_VERSION}_all.deb"
 TMP_DEB="/tmp/phoronix-test-suite_${PTS_VERSION}_all.deb"
 
 if command -v phoronix-test-suite >/dev/null 2>&1; then