feat(helper): Add ctest options from env

./helper.mk test ctest="ctest -VV -R  zpc_config_test"

Signed-off-by: Philippe Coval <philippe.coval@silabs.com>

Author: rzr

helper.mk

@@ -102,6 +102,9 @@ endif
 
 run_file?=${build_dir}/applications/zpc/zpc
 
+# Can be overloaded from env: ./helper.mk ctest="ctest -V -R"
+ctest?=ctest
+
 help: ./helper.mk
 	@echo "# ${project}: ${url}"
 	@echo "#"
@@ -247,7 +250,7 @@ ${build_dir}: ${build_dir}/CMakeCache.txt
 	file -E "$<"
 
 test: ${build_dir}
-	ctest --test-dir ${<}/${project_test_dir}
+	${ctest} --test-dir ${<}/${project_test_dir}
 
 check: test