Refactor TestIcebergCommitter state recovery unit tests to use checkpointId=1

[rodmeneses]

Feature Request / Improvement

During the implementation of the new Iceberg Sink based on SinkV2 interface (#10179)
I found that state recovery unit tests were failing when using a starting checkpointId different from zero.

This has been documented here: https://issues.apache.org/jira/browse/FLINK-36058

As of now, we are obligated to use checkpointId=0 when testing state recovery use cases. Once the above Flink issue is fixed, we can revisit these tests and make them use start checkpointId=1.

Query engine

Flink

Willingness to contribute

• I can contribute this improvement/feature independently
• I would be willing to contribute this improvement/feature with guidance from the Iceberg community
• I cannot contribute this improvement/feature at this time

[github-actions]

This issue has been automatically marked as stale because it has been open for 180 days with no activity. It will be closed in next 14 days if no further activity occurs. To permanently prevent this issue from being considered stale, add the label 'not-stale', but commenting on the issue is preferred when possible.

[github-actions]

This issue has been closed because it has not received any activity in the last 14 days since being marked as 'stale'