driver:Trim the build components

Trim the build components to decrease the load of Gitlab server.

components/driver/test_apps/legacy_timer_driver/CMakeLists.txt

@@ -1,5 +1,8 @@
 # This is the project CMakeLists.txt file for the test subproject
 cmake_minimum_required(VERSION 3.16)
 
+# "Trim" the build. Include the minimal set of components, main, and anything it depends on.
+set(COMPONENTS main)
+
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(legacy_timer_driver_test)

components/driver/test_apps/legacy_timer_driver/main/CMakeLists.txt

@@ -4,4 +4,5 @@ set(srcs "test_app_main.c"
 # In order for the cases defined by `TEST_CASE` to be linked into the final elf,
 # the component can be registered as WHOLE_ARCHIVE
 idf_component_register(SRCS ${srcs}
+                       PRIV_REQUIRES unity driver
                        WHOLE_ARCHIVE)