azurerm_linux_function_app - add flex consumption feature.

[xiaxyi]

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Description

Support azure function running in azure flex consumption plan

PR Checklist

• I have followed the guidelines in our Contributing Documentation.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
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Change Log

Below please provide what should go into the changelog (if anything) conforming to the Changelog Format documented here.

• azurerm_resource - support for the thing1 property [GH-00000]

This is a (please select all that apply):

• Bug Fix
• New Feature (ie adding a service, resource, or data source)
• Enhancement
• Breaking Change

Related Issue(s)

Fixes #0000

Note

If this PR changes meaningfully during the course of review please update the title and description as required.

[dvasdekis]

Very excited for this PR! Please review team :)

[nzthiago]

Please do not add this FUNCTIONS_EXTENSION_VERSION app setting for Flex Consumption function apps. It will eventually be blocked for Flex Consumption apps and is not required. The runtime version that this conveyed for other hosting plans is now handled automatically by the platform for Flex Consumption.

[nzthiago]

This list might not be true for all regions, and we might introduce new instance sizes in the future. The actual list per region comes from the Stacks API but that is dynamic, not sure if we can use it in terraform to validate right? So here we have to decide:

• Do we not validate and let the user put any number (which if they put incorrectly will show a control plane exception)
• Or do we put the current list here of all possible current instance sizes here, and then keep updating the list of values as new instance sizes are introduced?

[dvasdekis]

From our perspective, we would rather have new sizes available immediately and a control plane exception kick up, rather than having to wait for the AzureRM team to fix it each time a new size is available. My vote is for option 1 (no validation).