Add C# client SDK procedures

[JasonAtClockwork]

Description of Changes

Closes: #3533 Updated the C# SDK to handle procedures and procedure callbacks in a similar fashion to the Rust client as well as added the codegen to support it.

API and ABI breaking changes

N/A

Expected complexity level and risk

2 - This adds a new testing frame that should be removed once procedures are handled with C# module bindings

Testing

Added /sdks/csharp/examples~/regression-tests/procedure-client to match modules/sdk-test-procedure which we can roll into the standard regression-tests once C# supports the procedure attribute.

• [x] Add C# client test of sdk-test-procedure