Adding a new linked account breaks for sub organizations with an organization handle

[HasiniSama]

Description

$subject

Steps to Reproduce

1. Go to myaccount of a suborg created with a handle -> personal info -> linked accounts
2. Try to add another sub org user.

Please select the area issue is related to

B2B

Version

7.2

Environment Details (with versions)

No response

Developer Checklist

• [Behavioural Change] Does this change introduce a behavioral change to the product?
•  ↳ Approved by team lead
•  ↳ Label impact/behavioral-change added
• [Migration Impact] Does this change have a migration impact?
•  ↳ Migration label added (e.g., 7.2.0-migration)
•  ↳ Migration issues created and linked
• [New Configuration] Does this change introduce a new configuration?
•  ↳ Label config added
•  ↳ Configuration is properly documented

[HasiniSama]

PRs:

• Append organization handle instead of organizationId to userId for linked accounts identity-apps#8675
• Remove logic for resolving tenant domain for sub organizations wso2-extensions/identity-user-account-association#58

[HasiniSama]

Without an org handle

Screen.Recording.2025-07-30.at.17.01.35.mov

With an org handle

Screen.Recording.2025-07-30.at.16.59.40.mov