Auth UserRecord class missing passwordUpdatedAt property

[jacobg]

• Operating System version: MacOS 3.2
• Firebase SDK version: 11.4.1
• Firebase Product: auth
• Node.js version: 18.13.0
• NPM version: 8.19.3

[REQUIRED] Step 3: Describe the problem

Steps to reproduce:

The getUser function wraps a call to the REST API method getAccountInfo:
https://developers.google.com/resources/api-libraries/documentation/identitytoolkit/v3/python/latest/identitytoolkit_v3.relyingparty.html#getAccountInfo

That API method exposes a passwordUpdatedAt property. However, the Admin SDK is instantiating a UserRecord class from the response which is missing that property. This property is useful in order to track password changes (e.g., send alert email to user that password was changed).

[yeruchomWhale]

PR with a fix #3023