Support AsyncMysqlQueryErrorResult and SQLFakeAsyncMysqlException

[pbibra]

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• Feature request
• Question
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Feature request

I would like to have an implementation of `AsyncMysqlQueryErrorResult` and `SQLFakeAsyncMysqlException` that behaves similarly to `AsyncMysqlException`. 
This is an SQL/AsyncMysql feature.

`AsyncMysqlQueryErrorResult` should allow for setting the error code and error message of the result in its constructor.
`SQLFakeAsyncMysqlException` should allow for setting the `AsyncMysqlErrorResult` in its constructor.