ena: update ENA version to v2.5.0

Some of the changes in this release:

• IPv6 L4 checksum offload fixes.
• Optimization of the Tx req_id validation.
• Timer service adjustments.
• NUMA awareness for the kernel RSS mode.

Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
MFC after: 2 weeks
Sponsored by: Amazon, Inc.