Check rollback_to_snapshot accuracy when it does not do any changes

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Description

When performing rollback_to_snapshot procedure calls with the latest snapshot of the table as parameter, the operation used to fail in Trino 403 while it depended on Iceberg 1.0.0:

Caused by: java.lang.IllegalStateException: Cannot commit transaction: last operation has not committed
    at org.apache.iceberg.relocated.com.google.common.base.Preconditions.checkState(Preconditions.java:502)
    at org.apache.iceberg.BaseTransaction.commitTransaction(BaseTransaction.java:252)
    at org.apache.iceberg.SnapshotManager.commit(SnapshotManager.java:158)
    at io.trino.plugin.iceberg.RollbackToSnapshotProcedure.rollbackToSnapshot(RollbackToSnapshotProcedure.java:80)

With Iceberg 1.1.0 the problem was fixed in apache/iceberg#5536 .

This extra check is a regression test for future Iceberg library releases.

Additional context and related issues

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