Use default Kiota middleware in client

[kfcampbell]

The go-sdk was using the default Kiota middleware before applying our own default middlewares before applying any user-defined middleware. This change modifies the dotnet-sdk to do the same, giving us the benefit of the default Kiota redirect and retry middlewares, among others. For a full list, see here.

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Before the change?

• The default Kiota middlewares were not used in the client.

After the change?

• The default middlewares are applied in the client.

Pull request checklist

• [X] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

Please see our docs on breaking changes to help!

• [ ] Yes
• [X] No

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