Support `alter column set type` for iceberg tables

[sfc-gh-abozkurt]

We should support schema type evolution according to iceberg spec v2, our current iceberg implementation.

• make sure partition values of existing files are interpreted the same with the new type.
• make sure data file stats of existing files are interpreted the same with the new type.
• make sure to support all catalogs: postgres, rest and object_store.