samples: video: capture: Fix camera fixture test

The logs that the fixture test are based on are not printed anymore due
to recent changes from "printk" to "LOG_DBG". Change the log level so
that it can work again.

Remove "Capture started" as it is not a relevant test regex. Logs are
sometimes not correctly printed in the console, for example, we can see:

DEBUG   - DEVICE: muart:~$ [mapture started

As "Capture started" is a one-time log, fixture test will then fail due
to timeout.

Also, consolidate other regex.

Signed-off-by: Phi Bang Nguyen <phibang.nguyen@nxp.com>

samples/drivers/video/capture/sample.yaml

@@ -10,16 +10,17 @@ tests:
       - platform:mimxrt1064_evk:SHIELD="dvp_fpc24_mt9m114;rk043fn66hs_ctg"
       - platform:mimxrt1170_evk/mimxrt1176/cm7:SHIELD="nxp_btb44_ov5640;rk055hdmipi4ma0"
       - platform:mimxrt1170_evk@B/mimxrt1176/cm7:SHIELD="nxp_btb44_ov5640;rk055hdmipi4ma0"
+    extra_configs:
+      - CONFIG_TEST=y
     harness: console
     harness_config:
       fixture: fixture_camera
       type: multi_line
       ordered: true
       regex:
-        - "Capture started"
-        - "Got frame"
-        - "size"
-        - "timestamp"
+        - "Got frame \\d+"
+        - "size: \\d+;"
+        - "timestamp \\d+"
     platform_allow:
       - arduino_nicla_vision/stm32h747xx/m7
       - mimxrt1064_evk

samples/drivers/video/capture/src/main.c

@@ -10,7 +10,12 @@
 #include <zephyr/drivers/display.h>
 #include <zephyr/drivers/video.h>
 
+#ifdef CONFIG_TEST
+#define LOG_LEVEL LOG_LEVEL_DBG
+#else
 #define LOG_LEVEL CONFIG_LOG_DEFAULT_LEVEL
+#endif
+
 #include <zephyr/logging/log.h>
 LOG_MODULE_REGISTER(main);