Function app zipdeploy command fails due to invalid sas uri

'az functionapp deployment source config-zip' command generates a sas uri, uploads app content and updates the WEBSITE_RUN_FROM_PACKAGE appsetting with the newly generated uri.

The generated sas uri is not based on UTC, so it is possible the sas uri might not be valid for a few hours depending on the region where the sas uri is generated.

https://github.com/Azure/azure-cli/blob/ddeaff14e255669d535f135f46e3009a10d49ad2/src/azure-cli/azure/cli/command_modules/appservice/custom.py#L558

Looks like the datetime logic needs to use tzinfo class to set the timezone.