Consider using Bouncy Castle BCrypt implementation

[jgrandja]

BCryptPasswordEncoder currently uses an internal implementation of BCrypt.

We should consider removing the internal implementation and use Bouncy Castle's implementation instead.

NOTE: Argon2PasswordEncoder and SCryptPasswordEncoder already uses Bouncy Castle's implementation.

Related gh-16879

[evgeniycheban]

Hi, @jgrandja can I work on this?

[jgrandja]

Thanks for the offer @evgeniycheban . The team still needs to discuss this before we proceed (or don't) with the proposed change. If we decide to go ahead with it, I'll reach out to you and we can move forward then.