fix(oauthimap): unable to save authorization code with Azure OAuth

[MyvTsv]

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes !40291
• When configuring an SMTP collector with Azure OAuth authentication, users received the following error:

Unable to save authorization code

The Azure provider's getOwnerDetails() method could not retrieve the user's email address. The code only attempted to retrieve the email and upn claims, but Azure did not return either of them in any case, causing the authorization save to fail.

Screenshots (if appropriate):