ci/bare-metal: Add per-boot-stage timeouts for fastboot and poe.

This should avoid the 1-hour timeouts if something goes wrong, and just
restart.

Fixes: #6682
Acked-by: Juan A. Suarez <jasuarez@igalia.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17096>

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

@@ -50,7 +50,7 @@ class PoERun:
             return 1
 
         boot_detected = False
-        for line in self.ser.lines():
+        for line in self.ser.lines(timeout=5 * 60, phase="bootloader"):
             if re.search("Booting Linux", line):
                 boot_detected = True
                 break
@@ -60,7 +60,7 @@ class PoERun:
                 "Something wrong; couldn't detect the boot start up sequence")
             return 2
 
-        for line in self.ser.lines():
+        for line in self.ser.lines(timeout=20 * 60, phase="test"):
             if re.search("---. end Kernel panic", line):
                 return 1