Tests: Avoid enabling languages in RunCMake.CommandLine -S and -B cases

The test project does not compile any sources and so does not
need to enable any languages.

Tests/RunCMake/CommandLine/ExplicitDirs/CMakeLists.txt

@@ -1,4 +1,5 @@
-cmake_minimum_required(VERSION 3.0.0 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.14)
+project(ExplicitDirs NONE)
 add_custom_command(
   OUTPUT output.txt
   COMMAND ${CMAKE_COMMAND} -E echo CustomCommand > output.txt