.Net: Update CosmosNoSql to latest SDK and update FullTextScore syntax

[westey-m]

Motivation and Context

The FullTextScore syntax for CosmosNoSql changed after the feature went GA recently so we need to update to the latest SDK version and update the syntax.

#12545

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[markwallace-microsoft]

Unrelated integration test failure

[xUnit.net 00:04:59.55]       Microsoft.SemanticKernel.HttpOperationException : HTTP 400 (invalid_request_error: content_policy_violation)
[xUnit.net 00:04:59.55]     SemanticKernel.IntegrationTests.Connectors.AzureOpenAI.AzureOpenAITextToImageTests.ItCanReturnImageUrlAsync [FAIL]
[xUnit.net 00:04:59.55]       
[xUnit.net 00:04:59.55]       Your request was rejected as a result of our safety system. Your prompt may contain text that is not allowed by our safety system.
[xUnit.net 00:04:59.55]       ---- System.ClientModel.ClientResultException : HTTP 400 (invalid_request_error: content_policy_violation)