samples: enable rt700 die_temp_polling sample

1. The updated regex better matches device names
for various temperature sensors. If a device name
contains hyphens, the new regex can match it.

2. enable rt700 die_temp_polling sample

Signed-off-by: Zhaoxiang Jin <[email protected]>

Author: ZhaoxiangJin

samples/sensor/die_temp_polling/boards/mimxrt700_evk_mimxrt798s_cm33_cpu0.overlay

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2025 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/dt-bindings/adc/adc.h>
+#include <zephyr/dt-bindings/adc/mcux-lpadc.h>
+
+&pmc_tmpsns {
+	status = "okay";
+	io-channels = <&lpadc0 0>;
+};
+
+&lpadc0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	channel@0 {
+		reg = <0>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_EXTERNAL0";
+		zephyr,acquisition-time = <ADC_ACQ_TIME(ADC_ACQ_TIME_TICKS, 131)>;
+		zephyr,input-positive = <MCUX_LPADC_CH6A>;
+		zephyr,input-negative = <MCUX_LPADC_CH6B>;
+		zephyr,differential;
+	};
+};

samples/sensor/die_temp_polling/sample.yaml

@@ -13,4 +13,4 @@ tests:
     harness_config:
       type: one_line
       regex:
-        - "CPU Die temperature\\[[A-Za-z0-9_@]+\\]: [1-9][0-9].[0-9] °C"
+        - "CPU Die temperature\\[[\\-A-Za-z0-9_@]+\\]: [1-9][0-9].[0-9] °C"