test: kenrel: group sleep tests

Group test using doxygen.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

tests/kernel/early_sleep/src/main.c

@@ -4,25 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/*
- * @file
- * @brief Test early sleep functionality
- *
- * @defgroup kernel_earlysleep_tests Early Sleep Tests
- *
- * @ingroup all_tests
- *
- * This test verifies that k_sleep() can be used to put the calling thread to
- * sleep for a specified number of ticks during system initialization.  In this
- * test we are calling k_sleep() at POST_KERNEL and APPLICATION level
- * initialization sequence.
- *
- * Note: We can not call k_sleep() during PRE_KERNEL1 or PRE_KERNEL2 level
- * because the core kernel objects and devices initialization happens at these
- * levels.
- * @{
- * @}
- */
+
 
 #include <zephyr/init.h>
 #include <zephyr/arch/cpu.h>
@@ -82,12 +64,19 @@ static int test_early_sleep_app(void)
 
 SYS_INIT(test_early_sleep_app, APPLICATION, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
 
-/**
- * @brief Test early sleep
+/*
+ * @brief Test early sleep functionality
+ *
+ * @ingroup kernel_sleep_tests
  *
- * @ingroup kernel_earlysleep_tests
+ * This test verifies that k_sleep() can be used to put the calling thread to
+ * sleep for a specified number of ticks during system initialization.  In this
+ * test we are calling k_sleep() at POST_KERNEL and APPLICATION level
+ * initialization sequence.
  *
- * @see k_sleep()
+ * Note: We can not call k_sleep() during PRE_KERNEL1 or PRE_KERNEL2 level
+ * because the core kernel objects and devices initialization happens at these
+ * levels.
  */
 ZTEST(earlysleep, test_early_sleep)
 {