Support for changing prefix and suffix in `DelegatingPasswordEncoder`

[heowc]

Expected Behavior

I can change prefix and suffix.

Current Behavior

I can not change prefix and suffix.
See https://github.com/spring-projects/spring-security/blob/main/crypto/src/main/java/org/springframework/security/crypto/password/DelegatingPasswordEncoder.java#L124...L126

Context

We can increase the flexibility for DelegatingPasswordEncoder.
ex)

{bcypt}blabla~~~  -->  bcypt$blabla~~~

[rwinch]

Thanks for the issue @heowc! Would you be willing to submit a PR (with tests)?

[heowc]

Thanks for the issue @heowc! Would you be willing to submit a PR (with tests)?

Of course! 😀