Investigate Managed Identity flow for sdk type bindings

[surgupta-msft]

This doc - link explains multiple ways that a Managed Identity can be used with the Function App. Need to investigate if same approaches can be used with sdk-type-bindings changes or if we need any custom handling.

• AppSetting AzureWebJobsStorage__accountName
• AppSetting AzureWebJobsStorage__blobServiceUri
• Using TenantId, ClientId, Client Secret - for local development with user assigned identity
• Using TokenCredential and ClientId - only for portal app

[fabiocav]

Adding this to sprint 135 as a stretch goal.