devel/py-azure-mgmt-servicelinker: Update to 1.2.0b3

• Update COMMENT
• Update WWW
• Add LICENSE_FILE
• Sort RUN_DEPENDS
• Convert to USE_PYTHON=pep517
• Update pkg-descr

Changes: https://github.com/Azure/azure-sdk-for-python/releases

		https://github.com/Azure/azure-sdk-for-python/blob/main/sdk/servicelinker/azure-mgmt-servicelinker/CHANGELOG.md