revert: @node-rs/argon2 -> node-argon2 (#4829)

* revert: partial revert of 723469ab5bed3ba9fbb3e8d5ecbfcd9a3bee2d88

This reverts part of the changes introduced in refactor: migrate from argon2 ->
@node-rs/argon2 (#4733)

Switching to @node-rs/argon2 introduced bugs that we couldn't solve due to
limitations in npm.

see here
https://github.com/coder/code-server/issues/4804#issuecomment-1030338395