Reduce the amount of data sent back to JS/TS from WASM

[jtran]

Not ready for merging. See comments below.

Part of #4437.

We only send back the fields that are actually used. And for ProgramMemory, we clear out the memory inside closures since they're not used on the JS/TS side, as far as I know.

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Codecov Report

Attention: Patch coverage is 8.33333% with 11 lines in your changes missing coverage. Please review.

Project coverage is 85.81%. Comparing base (70b8541) to head (c7b7b91).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/wasm-lib/kcl/src/execution/mod.rs	8.33%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4874      +/-   ##
==========================================
- Coverage   85.84%   85.81%   -0.04%     
==========================================
  Files          86       86              
  Lines       30946    30958      +12     
==========================================
+ Hits        26566    26567       +1     
- Misses       4380     4391      +11     

Flag	Coverage Δ
wasm-lib	85.81% <8.33%> (-0.04%)	⬇️

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[jtran]

Thinking about this, this branch may have broken partial execution when a pipeline uses a closure. I will need to test this when I get back.

[jtran]

For this panic in #4437, I think the correct solution is to move the partial execution logic to Rust. This way, we wouldn't need to send all of program memory to TS, mutate it, and send it back to Rust. We would keep it in Rust (or filter down what we send to TS like in my draft PR), and when we do partial execution, we give the parameter(s) we need to do it on the Rust side. This way, we don't need to send program memory back and forth.