[Feature]: Add Flex Consumption app support to Update-AzFunctionApp

[Francisco-Gamino]

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

[github-actions]

Here are some similar issues that might help you. Please check if they can solve your problem.

• [Functions] Add support to create Flex Consumption function apps #24349

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Possible solution (Extracted from existing issue, might be incorrect; please verify carefully)

At a minimum:

• Support the API version to build the particular properties

Ideal:

• Hero Command or switch like -Type FlexConsumption that automates a lot of the steps
• A publish command to utilize the new Create and Publish actions
  Support Azure Functions Flex Consumption create and publish azure-dev#3658
• https://github.com/Azure/azure-cli/blob/dev/src/azure-cli/azure/cli/command_modules/appservice/custom.py#L720

Reference:

• [Functions] Add support to create Flex Consumption function apps #24349 (comment)

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[microsoft-github-policy-service]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @Drewm3, @TravisCragg-MSFT, @nikhilpatel909, @sandeepraichura, @hilaryw29, @GabstaMSFT, @ramankumarlive, @ushnaarshadkhan.

[microsoft-github-policy-service]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @Drewm3, @TravisCragg-MSFT, @nikhilpatel909, @sandeepraichura, @hilaryw29, @GabstaMSFT, @ramankumarlive, @ushnaarshadkhan.

[microsoft-github-policy-service]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @AnatoliB, @Francisco-Gamino, @shreyabatra4.