Make Self-Registration Page Sign-In Button Consistent with Application Access URL Usage

[PasinduYeshan]

Description

In the self-registration page, the Sign In button currently utilizes the callback URL provided through the request.
However, in other places, such as recovery scenario pages, we have updated the logic to prefer the application access URL over the callback URL.

To maintain consistency across the application:

• Update the self-registration page to use the application access URL if it is configured.
• If the application access URL is not configured, fallback to the validated callback URL.

Related Issues

• Honour to application access URLs for callback url regex pattern in recovery scenarios #17999

Version

IS 7.1.0

[PasinduYeshan]

PR:

• Honour application URL for sign in button in self registration page identity-apps#8115