Support expression resolution from configuration sources registered by the worker

[fabiocav]

This tracks a feature request for the issue described in #1238

To summarize: Today, the expression resolution is performed by the host, so configuration sources registered with the worker are not used in the process.

We should support resolution from sources registered by the worker to ensure we have parity with the host behavior.

[kshyju]

Also #418

[liliankasem]

@fabiocav we need a host design issue to track support for this feature

[christianarg]

Is there any update on this? Now NET7 only supports azure functions isolated and having to replicate configurations in each function instead of using app configuration is pretty bad. Considering we COULD do it in Azure Function In-Process

[a30004542]

Hello Team, is there an update on this with .net 8 release?

[tomcain]

Hello, any feedback from AZ Function team?

Can anyone suggest an Azure alternative to Azure Functions? Seems to be a lot of inconsistencies and not well supported .Net patterns that are well established in other types of apps.

[jaliyaudagedara]

As of today (02/30/2024), this is still not supported.

The workaround: Use App Configuration references for App Service and Azure Functions (preview)