Updates the domino dependency to the latest version as used in the main branch.

This update contains fixes for angular/domino#29.

…r URL parsing behavior

Extracts the regular expression for matching malformed absolute URLs to a module-scoped constant in url.ts.

Additionally, adds comprehensive inline documentation to clarify:
- The path normalization behavior of LEADING_SLASHES_REGEX which collapses consecutive slashes and backslashes.
- The rationale for using 'http://localhost' as the fallback base URL for virtual document initialization in server.ts.

…relative URLs

Backports the security fixes from:

- #68973

- #69018