Respect the hashing.rehash_on_login setting introduced in laravel 11

[tjarrett]

Laravel 11 introduced new functionality where it will rehash a user's password on each login unless the config hashing.rehash_on_login is set to false.

We don't use passwords as we only do single sign on.

This passes the setting to the guard created in ImpersonateServiceProvider.

[dylanbr]

I've had an issue with this too when setting hashing.rehash_on_login to false, and would like to see this merged.

[drbyte]

@MarceauKa One note: since this PR uses a PHP named argument, it will require minimum PHP ^8.0, dropping support for ^7.2.

[tjarrett]

@MarceauKa One note: since this PR uses a PHP named argument, it will require minimum PHP ^8.0, dropping support for ^7.2.

I can re-do it so support 7.2 if you'd like.

[tjarrett]

@MarceauKa One note: since this PR uses a PHP named argument, it will require minimum PHP ^8.0, dropping support for ^7.2.

I re-did the pull request to support PHP 7.2.