[Text Analytics] Remove hardcoded Modelversion from Transforms.cs for Analyze endpoint

[suhas92]

Describe the bug
We need to remove hardcoded Model version from Transforms.cs for Analyze endpoint once the service fixes it on the backend.

#18406 (comment)

Expected behavior
What is the expected behavior?

Actual behavior (include Exception or Stack Trace)
What is the actual behavior?

To Reproduce
Steps to reproduce the behavior (include a code snippet, screenshot, or any additional information that might help us reproduce the issue)

Environment:

• Name and version of the Library package used: [e.g. Azure.Storage.Blobs 12.2.0]
• Hosting platform or OS and .NET runtime version (dotnet --info output for .NET Core projects): [e.g. Azure AppService or Windows 10 .NET Framework 4.8]
• IDE and version : [e.g. Visual Studio 16.3]