utest: move entry from examples to utest

Change the entry of utest's Kconfig from
examples/utest/testcases/Kconfig to
components/utilities/utest/Kconfig.

In the future, the testcase source code of
utest will be placed in each module for
maintenance, but the entry of Kconfig will all
be placed in components/utilities/utest/Kconfig
for unified maintenance. In this way, when
executing menuconfig, people can enter and
configure from one place, avoiding searching
for utest configuration switches here and
ther in the menuconfig interface.

For each module, you can maintain unit-test
in a unified manner in the following way:
- Create a subdirectory named 'utest' in the
  directory where your module is located.
- Store the following files in the utest subdirectory:
  - Unit test case program source code files for this
    module.
  - Kconfig file, add configuration options for the
    unit test files of this module, the recommended
    option is named RT_UTEST_TC_USING_XXXX, XXXX is the
    global unique module name of this module.
  - SConscript file, note that when adding src files,
    in addition to relying on RT_UTEST_TC_USING_XXXX,
    you must also rely on RT_UTEST_USING_ALL_CASES, the
    two dependencies are in an "or" relationship. The
    role of RT_UTEST_USING_ALL_CASES is that once this
    option is turned on, all unit tests will be enabled
    to avoid selecting one by one.

Signed-off-by: Chen Wang <[email protected]>

Author: unicornx

Kconfig

@@ -1,4 +1,4 @@
 rsource "src/Kconfig"
 rsource "libcpu/Kconfig"
 rsource "components/Kconfig"
-rsource "examples/utest/testcases/Kconfig"
+rsource "components/utilities/utest/Kconfig"

components/utilities/utest/Kconfig

@@ -0,0 +1,24 @@
+menu "RT-Thread Utestcases"
+
+config RT_USING_UTESTCASES
+    bool "RT-Thread Utestcases"
+    default n
+    select RT_USING_UTEST
+
+if RT_USING_UTESTCASES
+
+rsource "../../../examples/utest/testcases/utest/Kconfig"
+rsource "../../../examples/utest/testcases/kernel/Kconfig"
+rsource "../../../examples/utest/testcases/cpp11/Kconfig"
+rsource "../../../examples/utest/testcases/drivers/serial_v2/Kconfig"
+rsource "../../../examples/utest/testcases/drivers/serial_bypass/Kconfig"
+rsource "../../../examples/utest/testcases/drivers/ipc/Kconfig"
+rsource "../../../examples/utest/testcases/posix/Kconfig"
+rsource "../../../examples/utest/testcases/mm/Kconfig"
+rsource "../../../examples/utest/testcases/tmpfs/Kconfig"
+rsource "../../../examples/utest/testcases/smp_call/Kconfig"
+rsource "../../../examples/utest/testcases/perf/Kconfig"
+
+endif
+
+endmenu