FindHDF5: use import libraries when using hdf5-config.cmake on Windows

The `LOCATION` of imported shared libraries on Windows is that of the
`.dll`.  Use the import library instead to get the `.lib` to be linked.

Fixes: #16534

Modules/FindHDF5.cmake

@@ -436,8 +436,13 @@ if(NOT HDF5_FOUND)
             if(HDF5_FIND_DEBUG)
                 message(STATUS "Trying to get properties of target ${HDF5_${_lang}_TARGET}${_suffix}")
             endif()
-            get_target_property(_lang_location ${HDF5_${_lang}_TARGET}${_suffix} LOCATION)
-
+            # Find library for this target. Complicated as on Windows with a DLL, we need to search for the import-lib.
+            get_target_property(_imported_conf ${HDF5_${_lang}_TARGET}${_suffix} IMPORTED_CONFIGURATIONS)
+            get_target_property(_lang_location ${HDF5_${_lang}_TARGET}${_suffix} IMPORTED_IMPLIB_${_imported_conf} )
+            if (NOT _lang_location)
+                # no import lib, just try LOCATION
+                get_target_property(_lang_location ${HDF5_${_lang}_TARGET}${_suffix} LOCATION)
+            endif()
             if( _lang_location )
                 set(HDF5_${_lang}_LIBRARY ${_lang_location})
                 list(APPEND HDF5_LIBRARIES ${HDF5_${_lang}_TARGET}${_suffix})
@@ -445,7 +450,10 @@ if(NOT HDF5_FOUND)
                 set(HDF5_${_lang}_FOUND True)
             endif()
             if(FIND_HL)
-                get_target_property(_lang_hl_location ${HDF5_${_lang}_HL_TARGET}${_suffix} LOCATION)
+                get_target_property(__lang_hl_location ${HDF5_${_lang}_HL_TARGET}${_suffix} IMPORTED_IMPLIB_${_imported_conf} )
+                if (NOT _lang_hl_location)
+                    get_target_property(_lang_hl_location ${HDF5_${_lang}_HL_TARGET}${_suffix} LOCATION)
+                endif()
                 if( _lang_hl_location )
                     set(HDF5_${_lang}_HL_LIBRARY ${_lang_hl_location})
                     list(APPEND HDF5_HL_LIBRARIES ${HDF5_${_lang}_TARGET}${_suffix})