Testing: hotfix to recover test coverage CI

CMAKE_TESTING should automatically be enabled
but I hoped to do that in the test.cmake
target specific options and not in the main
CMakeLists. I have to see if I can make that
order work. Here the hotfix to make CI work
again.

CMakeLists.txt

@@ -415,6 +415,9 @@ endif()
 
 # optionally enable cmake testing (supported only on posix)
 option(CMAKE_TESTING "Configure test targets" OFF)
+if (${PX4_CONFIG} STREQUAL "px4_sitl_test")
+	set(CMAKE_TESTING ON)
+endif()
 if(CMAKE_TESTING)
 	include(CTest) # sets BUILD_TESTING variable
 endif()

Makefile

@@ -344,7 +344,6 @@ format:
 .PHONY: rostest python_coverage
 
 tests:
-	$(eval CMAKE_ARGS += -DCMAKE_TESTING=ON)
 	$(eval CMAKE_ARGS += -DCONFIG=px4_sitl_test)
 	$(eval CMAKE_ARGS += -DTESTFILTER=$(TESTFILTER))
 	$(eval ARGS += test_results)