Remove C# GetArgsAsObjectArray

[RReverser]

Description of Changes

This is a weird "duck-typed" API that has one usage in BitCraft, but it's easy to replace with either real reflection or strong-typed interfaces.

API and ABI breaking changes

If this is an API or ABI breaking change, please apply the corresponding GitHub label.

Expected complexity level and risk

1

How complicated do you think these changes are? Grade on a scale from 1 to 5, where 1 is a trivial change, and 5 is a deep-reaching and complex change.

This complexity rating applies not only to the complexity apparent in the diff, but also to its interactions with existing and future code.

If you answered more than a 2, explain what is complex about the PR, and what other components it interacts with in potentially concerning ways.

Testing

Describe any testing you've done, and any testing you'd like your reviewers to do, so that you're confident that all the changes work as expected!

• [x] Ran codegen test and updated snapshot.
• [ ] Write a test you want a reviewer to do here, so they can check it off when they're satisfied.

[kazimuth]

Looks like the tests are failing because the "correct" generated code needs to be fixed in one of the tests.

[RReverser]

Ah yeah messed up conflict resolution.