Remove redundant fields from plan `Insert`: `database` and `table`.

[drmingdrmer]

When building an Insert plan:

The table is fetched here:

https://github.com/datafuselabs/databend/blob/a4fb4f7973c3ceacb8f67fcb57c0f1cc9f0d52d6/src/query/sql/src/planner/binder/insert.rs#L93-L96

And TableInfo can be fetch with table.get_table_info(). And TableInof.desc is in form of <database>.<table>. Thus there is no need to keep field database and table in plan Insert, since database and table are only used for display, and can be replace with TableInfo.desc.

https://github.com/datafuselabs/databend/blob/a4fb4f7973c3ceacb8f67fcb57c0f1cc9f0d52d6/src/query/sql/src/planner/binder/insert.rs#L192-L200

And Insert::table_info does not have to be an Option anymore.

[guojidan]

/take

[guojidan]

database and table not only used for display. get_table and validate_table_access and HookOperator::create also need them, so I think we do not need remove them.

[guojidan]

cc @drmingdrmer

[drmingdrmer]

Thank you for investigating this issue. It seems addressing it is not as straightforward as initially anticipated.

I'm gonna spend more time to see why database and table are used more than expected.