[RFC] Move logic for test registration to the test harness (#2151)

And use in device_timer suite.

Signed-off-by: Kévin Petit <kpet@free.fr>

test_conformance/spirv_new/test_get_program_il.cpp

@@ -26,7 +26,7 @@ const char *sample_kernel_code_single_line[] = {
     "}\n"
 };
 
-TEST_SPIRV_FUNC(get_program_il)
+REGISTER_TEST(get_program_il)
 {
     clProgramWrapper source_program;
     size_t il_size = -1;