[1.x] Add Features::canUpdatePasswords() method

[jrd-lewis]

This PR will allow calls to Features::enabled(Features::updatePasswords) to be simplified can be updated by adding a canUpdatePasswords method in Features.php similar to the current canUpdateProfileInformation and canManageTwoFactorAuthentication methods.

Usage

Current:

if (Features::enabled(Features::updatePasswords())) {
    Route::get('settings/password', [PasswordController::class, 'edit'])
        ->name('password.edit');
}

After PR:

if (Features::canUpdatePasswords()) {
    Route::get('settings/password', [PasswordController::class, 'edit'])
        ->name('password.edit');
}