Set up default include directories on module target

Summary

This MR applies the NEW dune policy DP_DEFAULT_INCLUDE_DIRS that sets include-directories on the Dune::Grid targets instead of a global property. All targets with this implicit assumption need to be modified to link against Dune::Grid now. For tests this can be easily accomplished by linking all targets created in a directory to that library using link_libraries command inside that directory.

doc/recipes/CMakeLists.txt

@@ -2,5 +2,5 @@
 # SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
 
 
-dune_add_test(SOURCES recipe-iterate-over-grid.cc)
-dune_add_test(SOURCES recipe-integration.cc)
+dune_add_test(SOURCES recipe-iterate-over-grid.cc LINK_LIBRARIES Dune::Grid)
+dune_add_test(SOURCES recipe-integration.cc LINK_LIBRARIES Dune::Grid)