tcgc expose skip encoding on SdkQueryParameter type

[jhendrixMSFT]

Clear and concise description of the problem

At present, there's no field on SdkQueryParameter type indicating if the query param should be encoded or not. I believe the default it to presume it's encoded.
In swagger we have x-ms-skip-url-encoding and I believe there's a tsp design for this being worked on. This is the tracking issue to ensure the result is exposed in tcgc.

Checklist

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[iscai-msft]

This should be handled by microsoft/typespec#3736. Closing for this design, please reopen if there's still an issue