Tests: Add RunCMake.CommandLine ExplicitiDirs explicit work directory

Verify that the work directory is not selected as the source or build
tree.

Issue: #23285

Tests/RunCMake/CommandLine/RunCMakeTest.cmake

@@ -155,10 +155,14 @@ message(STATUS "CMAKE_BINARY_DIR='${CMAKE_BINARY_DIR}'")
 
   set(source_dir ${RunCMake_SOURCE_DIR}/ExplicitDirs)
   set(binary_dir ${RunCMake_BINARY_DIR}/ExplicitDirs-build)
+  set(working_dir ${RunCMake_BINARY_DIR}/ExplicitDirs-cwd)
 
   set(RunCMake_TEST_SOURCE_DIR "${source_dir}")
   set(RunCMake_TEST_BINARY_DIR "${binary_dir}")
 
+  file(MAKE_DIRECTORY "${working_dir}")
+  set(RunCMake_TEST_COMMAND_WORKING_DIRECTORY "${working_dir}")
+
   file(REMOVE_RECURSE "${binary_dir}")
   run_cmake_with_options(ExplicitDirs-S-arg -S ${source_dir} ${binary_dir})
   run_cmake_with_options(ExplicitDirs-S-arg-reverse-order ${binary_dir} -S${source_dir} )
@@ -194,6 +198,8 @@ message(STATUS "CMAKE_BINARY_DIR='${CMAKE_BINARY_DIR}'")
   run_cmake_with_options(ExplicitDirs-B-S -B${binary_dir} -S${source_dir})
   run_cmake_with_options(ExplicitDirs-B-S-extra-path -B${binary_dir} -S${source_dir} /extra/path/)
 
+  unset(RunCMake_TEST_COMMAND_WORKING_DIRECTORY)
+
   message("copied to ${RunCMake_TEST_BINARY_DIR}/initial-cache.txt")
   file(COPY ${RunCMake_SOURCE_DIR}/C_buildsrcdir/initial-cache.txt DESTINATION ${RunCMake_TEST_BINARY_DIR})