Extend Update-AzFunctionApp to support Flex Consumption apps. This includes adding configuration options for AlwaysReady (array of trigger/instance-count pairs), MaximumInstanceCount, InstanceMemoryMB, HttpPerInstanceConcurrency, and deployment storage settings (name, container, auth type/value).
### Description of the new feature **Description:** Update-AzFunctionApp currently only supports Consumption v1, Dedicated, and Premium function apps. Add support for updating Flex Consumption apps, including: - AlwaysReady configuration (array of trigger/instance-count pairs) - MaximumInstanceCount, InstanceMemoryMB, HttpPerInstanceConcurrency - Deployment storage settings (name, container, auth type/value) Consider parity with Az CLI commands (az functionapp update, az functionapp scale config set, etc.) or introducing new cmdlets like: - - Set-AzFunctionAppScaleConfig - for scale and concurrency settings - Set-AzFunctionAppDeploymentStorage - for deployment storage configuration ### Proposed implementation details (optional) _No response_