pw_hash is not working with bcrypt-y

Describe the Bug

Using the pw_hash() function with the 'bcrypt-y' algorithm inside an ini_setting resource causes a catalog compilation failure with an "Invalid argument" error when using Puppet stdlib version 9.7.0.

In stdlib 9.7.0, when I try to do this :

  ini_setting { 'my_thing.PASSWORD_HASH':
    ensure  => present,
    setting => 'my_thing.PASSWORD_HASH',
    value   => pw_hash($password, 'bcrypt-y','10$abcdefghijklmnopqrstuv),
    path    => $my_path,
  }

I get the following error :

Info: Loading facts
Notice: Requesting catalog from X
Notice: Catalog compiled by X
Error: Could not retrieve catalog from remote server: Error 500 on SERVER: Server Error: Evaluation Error: Error while evaluating a Function Call, Invalid argument - Invalid argument (file: /etc/puppetlabs/code/environments/X/site/profiles/manifests/my_thing.pp, line: 229, column: 16) on node X
Warning: Not using cache on failed catalog
Error: Could not retrieve catalog; skipping run

Environment

• stdlib version : 9.7.0
• puppet agent version : 7.34.0
• puppet server version : 7.17.3
• OS : Debian 11

Start at the pw_hash function entry point and reproduce the catalog compilation failure using the manifest, stdlib 9.7.0, and the listed Puppet versions. Trace how the bcrypt-y arguments are validated and add or update coverage for this invocation; done means the catalog compiles without the Invalid argument error.