stream_analytics_output_cosmosdb: add support for authentication_mode

[jiaweitao001]

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Description

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Change Log

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• stream_analytics_output_cosmosdb: add support for authentication_mode [https://github.com/Creating authentication_mode parameter for azurerm_stream_analytics_output_cosmosdb #18362]

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 #18362

Note

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[catriona-m]

Thanks for this @jiaweitao001 - I left one comment inline but once that is addressed I can take another look. Thanks!

[catriona-m]

Suggested change

	state.AuthenticationMode = string(*output.Properties.AuthenticationMode)
	state.AuthenticationMode = string(pointer.From(output.Properties.AuthenticationMode))

[jiaweitao001]

Will fix.

[catriona-m]

Thanks @jiaweitao001 LGTM!