devel/py-azure-mgmt-imagebuilder: Update to 1.4.0

• 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/compute/azure-mgmt-imagebuilder/CHANGELOG.md