HIVE-28366: Iceberg: Concurrent Insert and IOW produce incorrect result

[deniskuzZ]

What changes were proposed in this pull request?

Introduces the locking to serialize some operation execution

Why are the changes needed?

Fixes the data correctness in case of concurrent Insert and IOW

Does this PR introduce any user-facing change?

No

Is the change a dependency upgrade?

No

How was this patch tested?

ITests