fix(uve): Maintain URL when property is changed and is a URLContentMap

https://github.com/user-attachments/assets/21efb269-b350-4e2a-893c-b99e0c135d02

This pull request includes several changes to the DotEmaShellComponent in the core-web library, focusing on improving URL handling and removing redundant code.

Enhancements to URL handling:

Added a new test case to ensure the current URL is maintained as a query parameter when the URL property is changed and is a URLContentMap in dot-ema-shell.component.spec.ts.

Code simplification:

Modified the navigate method to use getTargetUrl for determining the target URL in dot-ema-shell.component.ts.
Removed the extractPageRefererUrl method, which was no longer necessary.

This PR fixes: #30030

dotCMS / core

fix(uve): Maintain URL when property is changed and is a URLContentMap #30740

Enhancements to URL handling:

Code simplification:

Quality Gate passed