Mark detail C/C++ tool variables as advanced

The details as to the commands/calls for clang-tidy/iwyu/cppcheck are
now marked as advanced, so as to not clutter the simplified CMake UI
output.

As always, the variables are still displayed in the advanced mode.

Author: StableCoder

tools.cmake

@@ -57,7 +57,7 @@ macro(cppcheck)
 endmacro()
 
 find_program(CLANG_TIDY_EXE NAMES "clang-tidy")
-mark_as_advanced(FORCE CLANG_TIDY_EXE)
+mark_as_advanced(FORCE CLANG_TIDY_EXE CMAKE_C_CLANG_TIDY CMAKE_CXX_CLANG_TIDY)
 if(CLANG_TIDY_EXE)
   message(STATUS "clang-tidy found: ${CLANG_TIDY_EXE}")
   if(NOT CLANG_TIDY)
@@ -88,7 +88,8 @@ else()
 endif()
 
 find_program(IWYU_EXE NAMES "include-what-you-use")
-mark_as_advanced(FORCE IWYU_EXE)
+mark_as_advanced(FORCE IWYU_EXE CMAKE_C_INCLUDE_WHAT_YOU_USE
+                 CMAKE_CXX_INCLUDE_WHAT_YOU_USE)
 if(IWYU_EXE)
   message(STATUS "include-what-you-use found: ${IWYU_EXE}")
   if(NOT IWYU)
@@ -120,7 +121,7 @@ else()
 endif()
 
 find_program(CPPCHECK_EXE NAMES "cppcheck")
-mark_as_advanced(FORCE CPPCHECK_EXE)
+mark_as_advanced(FORCE CPPCHECK_EXE CMAKE_C_CPPCHECK CMAKE_CXX_CPPCHECK)
 if(CPPCHECK_EXE)
   message(STATUS "cppcheck found: ${CPPCHECK_EXE}")
   if(CPPECHECK)