samples: matter: Update release reference sample to 2.9.0 reference

In incoming release we are going to focus the most onsmoke co alarm.
This PR removes our release reference sample for 2.8.0 ncs realease
and adds smoke co alarm on nRF54L with diag logs as a new reference.

Signed-off-by: Hubert Górski <[email protected]>

Author: HubertHugo

samples/matter/light_bulb/sample.yaml

@@ -100,11 +100,3 @@ tests:
     integration_platforms:
       - nrf7002dk/nrf5340/cpuapp
     tags: sysbuild ci_samples_matter
-  sample.matter.light_bulb.debug.reference:
-    sysbuild: true
-    build_only: true
-    integration_platforms:
-      - nrf54l15dk/nrf54l15/cpuapp
-    extra_args: light_bulb_SNIPPET="diagnostic-logs"
-    platform_allow: nrf54l15dk/nrf54l15/cpuapp
-    tags: sysbuild ci_samples_matter

samples/matter/smoke_co_alarm/sample.yaml

@@ -41,3 +41,11 @@ tests:
       - nrf54l15dk/nrf54l15/cpuapp
     platform_allow: nrf54l15dk/nrf54l15/cpuapp
     tags: sysbuild ci_samples_matter
+  sample.matter.smoke_co_alarm.debug.reference:
+    sysbuild: true
+    build_only: true
+    integration_platforms:
+      - nrf54l15dk/nrf54l15/cpuapp
+    extra_args: smoke_co_alarm_SNIPPET="diagnostic-logs"
+    platform_allow: nrf54l15dk/nrf54l15/cpuapp
+    tags: sysbuild ci_samples_matter