jdbc: Support Connection.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS)

[Totktonada]

This is about the following methods of the Connection interface:

1. prepareStatement(sql, Statement.RETURN_GENERATED_KEYS)
2. prepareStatement(sql, columnIndexes)
3. prepareStatement(sql, columnNames)

The first one should be useful for an autoincremented primary key.

Don't sure we can support 2nd and 3rd (need to check metainfo content). If it is not so, then raise SQLFeatureNotSupportedException for these methods.

Blocked by tarantool/tarantool#2618

[Totktonada]

Not blocked amymore.