feat: schema engine postgres WASM implementation

[jacek-prisma]

Closes ORM-506. Implements most of the schema engine API for Postgres for WASM.

Notes:

• missing apply_migration_script, create_database, drop_database, shadow database
• had to refactor quite a lot of code for reasons below:
  • error handling must be a bit different for WASM because we get different errors in the WASM impl of quaint traits, I aimed to preserve the exisiting native behavior, while also having reasonable WASM errors
  • native driver code passes around connection URLs very frivolously and we don't have a connection URL in WASM
  • I've changed sqlite a little bit to make it more similar to the postgres code
  • had to introduce a trait for postgres SqlSchemaDescriber to make it compile against external connector

[github-actions]

WASM Query Engine file Size

Engine	This PR	Base branch	Diff
Postgres	2.120MiB	2.120MiB	0.000B
Postgres (gzip)	848.487KiB	848.488KiB	-1.000B
Mysql	2.082MiB	2.082MiB	0.000B
Mysql (gzip)	834.400KiB	834.399KiB	1.000B
Sqlite	1.990MiB	1.990MiB	0.000B
Sqlite (gzip)	797.977KiB	797.976KiB	1.000B

[codspeed-hq]

CodSpeed Performance Report

Merging #5136 will not alter performance

_{Comparing feat/schema-engine-postgres-wasm (c306ec9) with main (4767cae)}

Summary

✅ 11 untouched benchmarks

[jkomyno]

As discussed in a call, we were previously applying Box::pin twice by accident, so this change is fine.

[jkomyno]

Nice one! The git diff in this case is more drastic than it should be, most of the files that appear deleted are actually moved to another file