configure_new errors with minimum required CMake version

[Quba1]

CMakeLists.txt specifies minimum CMake version as 3.20

https://github.com/wrf-model/WRF/blob/c21d571d625286369212424810af300ca27495c6/CMakeLists.txt#L1C1-L1C39

However running configure_new with CMake version <3.23 fails with several errors like this:

CMake Error at cmake/target_source_properties.cmake:41 (define_property):
  define_property not given a BRIEF_DOCS <brief-doc> argument.
Call Stack (most recent call first):
  CMakeLists.txt:323 (define_target_source_properties)

This is because target_source_properties.cmake doesn't have BRIEF_DOCS and FULL_DOCS arguments in define_property():

WRF/cmake/target_source_properties.cmake

Lines 40 to 52 in c21d571

	foreach( PROPERTY ${FUNC_PROP_PROPERTIES} )
	define_property(
	SOURCE
	PROPERTY ${PROPERTY}
	# INHERITED # they will be "inherited" via target to source
	)
	define_property(
	TARGET
	PROPERTY ${PROPERTY}
	# INHERITED # they will be "inherited" via target to source
	)
	endforeach()

Those arguments have been changed to optional in Cmake 3.23 (see docs).

With Cmake <3.23 I have found this workaround to solve the issue:

  foreach( PROPERTY ${FUNC_PROP_PROPERTIES} )
    define_property(
                    SOURCE
                    PROPERTY   ${PROPERTY}
                    # INHERITED # they will be "inherited" via target to source
                    BRIEF_DOCS "dummy docs"
                    FULL_DOCS "dummy docs"
                    )

    define_property(
                    TARGET
                    PROPERTY   ${PROPERTY}
                    # INHERITED # they will be "inherited" via target to source
                    BRIEF_DOCS "dummy docs"
                    FULL_DOCS "dummy docs"
                    )
  endforeach()

Thus to solve this issue either minimum Cmake version should be raised to 3.23 or a workaround similar to mine should be used. I'm happy to create PR for either solution when a decision is reached.