* feat: add LoadIncrementalFilteredPolicy to append policies

Signed-off-by: Hassan Allybocus <hassan.allybocus@3ds.com>

* fix: added LoadIncrementalFilteredPolicy in enforcer_template

Signed-off-by: Hassan Allybocus <hassan.allybocus@3ds.com>

Co-authored-by: Hassan Allybocus <hassan.allybocus@3ds.com>