tests: wdt_basic_api: update to new ZTEST APIs

Update test suite to leverage new ZTEST APIs.

TEST=twister -T tests/drivers/watchdog/wdt_basic_api # Only build

Signed-off-by: Aaron Massey <aaronmassey@google.com>

Author: aaronemassey

tests/drivers/watchdog/wdt_basic_api/prj.conf

@@ -1,4 +1,5 @@
 CONFIG_WATCHDOG=y
 CONFIG_WDT_DISABLE_AT_BOOT=n
 CONFIG_ZTEST=y
+CONFIG_ZTEST_NEW_API=y
 CONFIG_BOOT_BANNER=n

tests/drivers/watchdog/wdt_basic_api/src/main.c

@@ -14,12 +14,5 @@
 
 #include <zephyr/zephyr.h>
 #include <ztest.h>
-#include "test_wdt.h"
 
-
-void test_main(void)
-{
-	ztest_test_suite(wdt_basic_test,
-			 ztest_unit_test(test_wdt));
-	ztest_run_test_suite(wdt_basic_test);
-}
+ZTEST_SUITE(wdt_basic_test_suite, NULL, NULL, NULL, NULL, NULL);

tests/drivers/watchdog/wdt_basic_api/src/test_wdt.c

@@ -60,7 +60,6 @@
 #include <zephyr/drivers/watchdog.h>
 #include <zephyr/zephyr.h>
 #include <ztest.h>
-#include "test_wdt.h"
 
 /*
  * To use this test, either the devicetree's /aliases must have a
@@ -356,7 +355,7 @@ static int test_wdt_bad_window_max(void)
 	return TC_FAIL;
 }
 
-void test_wdt(void)
+ZTEST(wdt_basic_test_suite, test_wdt)
 {
 	if ((m_testcase_index != 1U) && (m_testcase_index != 2U)) {
 		zassert_true(test_wdt_no_callback() == TC_PASS, NULL);