chore: Update zephyr ztest include paths and compiler flags (#660)

test/ztest/include/zephyr/ztest_assert.h

@@ -13,7 +13,7 @@
 #ifndef ZEPHYR_TESTSUITE_ZTEST_ASSERT_H_
 #define ZEPHYR_TESTSUITE_ZTEST_ASSERT_H_
 
-#include <zephyr/ztest.h>
+#include <zephyr/ztest_test.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
@@ -24,7 +24,6 @@ extern "C" {
 #endif
 
 const char *ztest_relative_filename(const char *file);
-void ztest_test_fail(void);
 #if CONFIG_ZTEST_ASSERT_VERBOSE == 0
 
 static inline bool z_zassert_(bool cond, const char *file, int line)

test/ztest/include/zephyr/ztest_test.h

@@ -24,6 +24,10 @@
 #ifndef ZEPHYR_TESTSUITE_ZTEST_TEST_H_
 #define ZEPHYR_TESTSUITE_ZTEST_TEST_H_
 
+#include <stddef.h>
+#include <stdbool.h>
+#include <stdint.h>
+
 #if 0 /* __ZEPHYR__ */
 #include <app_memory/app_memdomain.h>
 #endif /* __ZEPHYR__ */