ci/fastboot: Consistently restart the run on intermittent conditions.

Not currently on my list of intermittent issues, but let's be
resilient hopefully.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11308>

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

@@ -57,10 +57,11 @@ class FastbootRun:
                 break
 
             if re.search("data abort", line):
-                return 1
+                self.print_error("Detected crash during boot, restarting run...")
+                return 2
 
         if not fastboot_ready:
-            self.print_error("Failed to get to fastboot prompt")
+            self.print_error("Failed to get to fastboot prompt, restarting run...")
             return 2
 
         if self.logged_system(self.fastboot) != 0: