ci: Disable systems in my farm that haven't recovered.

We lost power in a storm, and these ones didn't come back afterwards.  I
suspect I need a new PSU.  And maybe some surge protection for the future.
:(

I've left the CI code in place for some day when I hopefully swap out the
power supplies.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21205>

src/gallium/drivers/crocus/ci/gitlab-ci.yml

@@ -20,7 +20,8 @@
     GPU_VERSION: crocus-hsw
     FDO_CI_CONCURRENT: 12
 
-crocus-g41:
+# System is dead at the moment. needs maintenance.
+.crocus-g41:
   extends:
     - .anholt-g41-test
     - .deqp-test
@@ -36,7 +37,7 @@ crocus-hsw:
     DEQP_SUITE: crocus-hsw
     PIGLIT_PLATFORM: gbm
 
-crocus-g41-traces:
+.crocus-g41-traces:
   extends:
     - .anholt-g41-test
     - .piglit-traces-test

src/gallium/drivers/i915/ci/gitlab-ci.yml

@@ -9,7 +9,8 @@
     GPU_VERSION: i915-g33
     FLAKES_CHANNEL: "#intel-ci"
 
-i915-g33:
+# System is dead at the moment. needs maintenance.
+.i915-g33:
   extends:
     - .anholt-g33-test
     - .deqp-test
@@ -17,7 +18,7 @@ i915-g33:
     DEQP_SUITE: i915g
     PIGLIT_PLATFORM: gbm
 
-i915-g33-traces:
+.i915-g33-traces:
   extends:
     - .anholt-g33-test
     - .piglit-traces-test