chore(schema-engine): get rid of toml -> Rust generation in json-rpc-api-build, which is now compatible with wasm32-unknown-unknown

[jkomyno]

This PR:

• Closes ORM-778
• Gets rid of toml -> Rust generation in json-rpc-api-build. Toml definitions are substituted with equivalent Rust struct/enum declarations, avoiding all the previous build-time shenanigans.
  • You can see the previous expanded macro in b1efb11.
• Renames json-rpc-api-build into json-rpc-api
• Enables wasm32-unknown-unknown usage of json-rpc-api

/integration

[codspeed-hq]

CodSpeed Performance Report

Merging #5224 will not alter performance

_{Comparing chore/json-rpc-refactoring (c56f830) with main (ebe9274)}

Summary

✅ 11 untouched benchmarks

[github-actions]

WASM Query Engine file Size

Engine	This PR	Base branch	Diff
Postgres	2.131MiB	2.131MiB	0.000B
Postgres (gzip)	858.518KiB	858.515KiB	3.000B
Mysql	2.094MiB	2.094MiB	0.000B
Mysql (gzip)	843.373KiB	843.371KiB	2.000B
Sqlite	2.004MiB	2.004MiB	0.000B
Sqlite (gzip)	808.099KiB	808.096KiB	3.000B

[jacek-prisma]

we're finally getting rid of the toml files! 😄