Fix for Transparency import on URP.

[vickycl]

Purpose of this PR

Ticket/Jira #:

Fixes Transparency for URP Import. Something similar could be done for HDRP but isn't included in this PR as a bug hasn't been reported there.

Testing

Functional Testing status:

Tested locally for Opaque + Alpha Clipping, Transparency + NO clipping, Transparency + clipping.

Performance Testing status:

TBD. There will be additional perf costs but only for URP.

Overall Product Risks

Complexity: Low

Halo Effect: Low

Additional information

Note to reviewers:

Are you happy to land a fix for URP but not HDRP?

Reminder:

• [x] Add entry in CHANGELOG.md (if applicable)