Update Nessie spec asper #2312

[ajantha-bhat]

update commit kernel : https://projectnessie.org/develop/kernel/
update Spec: https://projectnessie.org/develop/spec/

As per #2313

[ajantha-bhat]

Also better to work on these after apache/iceberg#3257 is merged. If any parameters goes for rename/change. Then it will leads to rework.

[ajantha-bhat]

Also need to handle code comments, look up (Iceberg: snapshot-ID) in code