devel/py-dulwich: Update version 0.21.2=>0.21.7

• Convert to pep517
• Utilize OPTIONSNG
• Change OPTIONS TESTS to TEST as that is the default OPTION defined in ports infrastructure for TEST
• Add non-default option FASTIMPORT and PARAMIKO

Changelog: https://github.com/jelmer/dulwich/releases/tag/dulwich-0.21.7

PR: 281937
Approved by: marco.broeder@posteo.eu (maintainer-timeout)