Current password field is required when a user changes their password

[miskopo]

Reproducer:

• login as a user (e.g. admin)
• in logged-in user's details, bottom kebab menu, click on Reset password
• provide a new password
• click on Reset Password

Actual behaviour:

Cause:
When a user is changing their own password, argument current_password is required [1]

Note:
The field current_password is not required when an admin is changing other user's passwords.

[1] https://freeipa.readthedocs.io/en/latest/api/passwd.html