feat(psl): add "async", "await", "using" to the list of reserved words

[jkomyno]

This PR:

• contributes to https://github.com/prisma/team-orm/issues/1384
• adds async, await, and using to the list of reserved words. This means that Prisma models cannot be named as such.

---

TODO(jkomyno): follow-up by adding the same words to the denylist in prisma/prisma: prisma/prisma#25748

[codspeed-hq]

CodSpeed Performance Report

Merging #5058 will not alter performance

_{Comparing feat/psl-reserved-words (8520863) with main (0160cc2)}

Summary

✅ 11 untouched benchmarks

[github-actions]

WASM Query Engine file Size

Engine	This PR	Base branch	Diff
Postgres	2.049MiB	2.049MiB	40.000B
Postgres (gzip)	821.939KiB	821.958KiB	-19.000B
Mysql	2.013MiB	2.013MiB	40.000B
Mysql (gzip)	807.916KiB	807.708KiB	213.000B
Sqlite	1.910MiB	1.910MiB	40.000B
Sqlite (gzip)	768.140KiB	768.141KiB	-1.000B