SupportsRowLevelDelete (Flink : Table : Common 2.0-preview1 API)

```
@PublicEvolving
public interface SupportsRowLevelDelete
```
Interface for DynamicTableSinks that support delete existing data according to row-level changes. The table sink is responsible for telling planner how to produce the row changes, and consuming them to achieve the purpose of row(s) deletion.
The planner will call the method applyRowLevelDelete(RowLevelModificationScanContext) to get the SupportsRowLevelDelete.RowLevelDeleteInfo returned by sink, and rewrite the delete statement based on the retrieved SupportsRowLevelDelete.RowLevelDeleteInfo to produce rows to DynamicTableSink.
Note: For the cases where the table sink implement both SupportsDeletePushDown and SupportsRowLevelDelete, the planner always prefers SupportsDeletePushDown over SupportsRowLevelDelete on condition that SupportsDeletePushDown.applyDeleteFilters(List) return true.

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static interface`	`SupportsRowLevelDelete.RowLevelDeleteInfo`	The information that guides the planner on how to rewrite the delete statement.
`static class`	`SupportsRowLevelDelete.RowLevelDeleteMode`	Type of delete modes that the sink expects for delete purpose.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`SupportsRowLevelDelete.RowLevelDeleteInfo`	`applyRowLevelDelete(RowLevelModificationScanContext context)`	Applies row-level delete with `RowLevelModificationScanContext`, and return a `SupportsRowLevelDelete.RowLevelDeleteInfo`.

- Method Detail
  - applyRowLevelDelete
```
SupportsRowLevelDelete.RowLevelDeleteInfo applyRowLevelDelete(@Nullable
                                                              RowLevelModificationScanContext context)
```
    Applies row-level delete with RowLevelModificationScanContext, and return a SupportsRowLevelDelete.RowLevelDeleteInfo.
    
    Parameters:
    
    context - the context passed by table source which implement SupportsRowLevelModificationScan. It'll be null if the table source doesn't implement it.