feat: Add DelRange API to go-client for deleting sort key ranges

[nanorth]

Feature Request

Describe the feature you'd like:
I would like to request the addition of a DelRange API in the Go client, similar to the one available in the Java client. This API would allow users to delete a range of sort keys under a specific hash key.

The API could look something like this:

DelRange(ctx context.Context, hashKey []byte, startSortKey []byte, stopSortKey []byte) error

DelRangeOpt(ctx context.Context, hashKey []byte, startSortKey []byte, stopSortKey []byte, options *DelRangeOptions) error

The functionality should be consistent with the Java client's implementation.