ci/baremetal: fix logic for retrying boot when it failed

Contrary to what the original commit said, this is actually still used
(see .gitlab-ci/bare-metal/poe-powered.sh:205), and the boot retry logic
has been broken ever since, exacerbating the rpi farm boot problems.

Fixes: 97b2afa16a ("ci/bare-metal: Drop the 2 vs 1 exit code from poe_run.")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30340>
(cherry picked from commit 2bc82b7147)

.gitlab-ci/bare-metal/poe_run.py

@@ -64,7 +64,7 @@ class PoERun:
         if not boot_detected:
             self.print_error(
                 "Something wrong; couldn't detect the boot start up sequence")
-            return 1
+            return 2
 
         self.logger.create_job_phase("test")
         for line in self.ser.lines(timeout=self.test_timeout, phase="test"):

.pick_status.json

@@ -1064,7 +1064,7 @@
         "description": "ci/baremetal: fix logic for retrying boot when it failed",
         "nominated": true,
         "nomination_type": 1,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": "97b2afa16aeeceff53fb43f657d4bfb8928682b1",
         "notes": null