Tests: Add RunCTest helper option to control CTest verbose flag

Tests/RunCMake/RunCTest.cmake

@@ -11,10 +11,13 @@ function(run_ctest CASE_NAME)
   endif()
   configure_file(${RunCMake_SOURCE_DIR}/CMakeLists.txt.in
                  ${RunCMake_BINARY_DIR}/${CASE_NAME}/CMakeLists.txt @ONLY)
+  if(NOT DEFINED RunCTest_VERBOSE_FLAG)
+    set(RunCTest_VERBOSE_FLAG "-V")
+  endif()
   run_cmake_command(${CASE_NAME} ${CMAKE_CTEST_COMMAND}
     -C Debug
     -S ${RunCMake_BINARY_DIR}/${CASE_NAME}/test.cmake
-    -V
+    ${RunCTest_VERBOSE_FLAG}
     --output-log ${RunCMake_BINARY_DIR}/${CASE_NAME}-build/testOutput.log
     --no-compress-output
     ${ARGN}