tests: drivers: w1: Move platform_allow in w1-serial

As per of str4t0m request, it is moved under
w1-serial section more detail in below link
https://github.com/zephyrproject-rtos/zephyr/pull/75009

Signed-off-by: Sadik Ozer <sadik.ozer@analog.com>

tests/drivers/w1/w1_api/testcase.yaml

@@ -4,11 +4,6 @@ common:
     - w1
     - userspace
   harness: ztest
-  platform_allow:
-    - nucleo_g0b1re
-    - nrf52840dk/nrf52840
-  integration_platforms:
-    - nrf52840dk/nrf52840
 
 tests:
   drivers.w1.w1-serial:
@@ -16,21 +11,32 @@ tests:
     extra_args: DTC_OVERLAY_FILE=w1_serial.overlay
     harness_config:
       fixture: w1_serial_idle
+    platform_allow:
+      - nucleo_g0b1re
+      - nrf52840dk/nrf52840
+    integration_platforms:
+      - nrf52840dk/nrf52840
   drivers.w1.ds2482-800:
     depends_on: arduino_i2c
     extra_args: DTC_OVERLAY_FILE=ds2482-800.overlay
     harness_config:
       fixture: w1_ds2482_800_idle
+    integration_platforms:
+      - nrf52840dk/nrf52840
   drivers.w1.ds2484:
     depends_on: arduino_i2c
     extra_args: DTC_OVERLAY_FILE=ds2484.overlay
     harness_config:
       fixture: w1_ds2484_idle
+    integration_platforms:
+      - nrf52840dk/nrf52840
   drivers.w1.ds2485:
     depends_on: arduino_i2c
     extra_args: DTC_OVERLAY_FILE=ds2485.overlay
     harness_config:
       fixture: w1_ds2485_idle
+    integration_platforms:
+      - nrf52840dk/nrf52840
   drivers.w1.max32:
     filter: dt_compat_enabled("adi,max32-w1")
     platform_allow: