[TCGC] Provide SdkApiVersionParameter as part of SdkParameter

[archerzz]

Clear and concise description of the problem

api-version is defined as metadata of the whole service, see an example: https://github.com/Azure/azure-rest-api-specs/blob/a5a01e06ffbbc0b0c945cb58fe769d19a4f93af4/specification/devcenter/DevCenter/main.tsp#L34

@doc("DevCenter service")
@versioned(APIVersions)
namespace DevCenterService;

• It would be better if we could provide SdkApiVersionParameter as part of SdkParameter instead of SdkMethodParameter
• In csharp (and probably some other languages), api-version is part of client parameters. However, certain service demands that we could provide api-version as method parameter so that users can override it. In that case, if we always provide api-version as method parameter, then we cannot differentiate where we should put api-version in the generated codes.

Checklist

• Follow our Code of Conduct
• Check that this issue is about the Azure libraries for typespec. For feature request in the typespec language or core libraries file it in the TypeSpec repo
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• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[iscai-msft]

Currently we use .isApiVersion information on parameters for this. This is because api version can be query, path, header etc. So this is by design. If you have an idea, can you go ahead and reopen the issue? I'm closing it because I believe this is by design. Thanks!