Fix bcrypt hashing failure for passwords longer than 72 bytes

[ayushthoren]

This PR fixes password hashing failures caused by bcrypt’s hard limit of 72 bytes on input passwords.

Currently, the full password is passed directly into bcrypt.hashpw(), which results in the error:
ValueError: password cannot be longer than 72 bytes, truncate manually if necessary

These changes manually truncate the password to avoid this issue.

[UrsusMortiferum]

@ayushthoren, we shouldn't be silently truncating passwords. Disabling a test would be a better approach.

There was already a backlash around it few years ago when people discover that ProtonMail is silently cutting their passwords - reddit post - ProtonMail cuts (silently) passwords at 73 characters

[ayushthoren]

Ah, you're right... I think I needed to look at this from the perspective of fixing the test, not the code, since it seems to be expected that the test will fail. Because of this, I think rather than disabling the test entirely, it might be better to switch the Exception from None to ValueError in this case?