[AppService] `az functionapp`: Update messaging for flex function apps

[kamperiadis]

Related command az functionapp create az functionapp deployment source config-zip

Description

• az functionapp create will no longer show the functions version warning for flex apps since that app setting is not relevant for the flex sku
• az functionapp deployment source config-zip will show the deployment ID
• az functionapp deployment source config-zip will not show an error message if the first deployment/latest status response was a 202 and is then followed by a 404 since that is likely just from the kudu pod getting recycled

Testing Guide

History Notes

• [AppService] az functionapp create will no longer show the functions version warning for flex apps since that app setting is not relevant for the flex sku
• [AppService] az functionapp deployment source config-zip will show the deployment ID
• [AppService] az functionapp deployment source config-zip will not show an error message if the first deployment/latest status response was a 202 and is then followed by a 404 since that is likely just from the kudu pod getting recycled

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[yonzhan]

AppService

[khkh-ms]

LGTM!