tests: drivers: sensor: temp_sensor: enable for nrf54l15dk

Incorrectly removed during transfer pdk->dk.

Signed-off-by: Piotr Kosycarz <[email protected]>

Author: nordic-piks

tests/drivers/sensor/temp_sensor/boards/nrf54l15dk_nrf54l15_cpuapp.overlay

@@ -0,0 +1,3 @@
+temp_sensor: &temp {
+	status = "okay";
+};