Introduce better way to manipulate Prisma PSL files

[tkiapril]

Currently, we are using awk to remove directives in schema.prisma for embeddable data proxy that are not supported in it. (6ef7b7d#diff-063238bce844b85998f2259b9d6ee46ab1a208a1b8c7cb389d60be21a84d1bc9R15-R27) However, this might be fragile, and might be better if we properly parse the file. Prisma seems to use wasm written in Rust for this: https://github.com/prisma/prisma-engines/blob/main/psl/psl-core/src/reformat.rs#L12