HHH-16789 Improve error message for use of limit without order by in subquery

[mehmetali2003]

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https://hibernate.atlassian.net/browse/HHH-16789

[gavinking]

I like improving error messages, but I don't think this is the right way to do this.

It would be better to change the grammar (HqlParser.g4) to accept limit with no order by, and then detect that and report this error from SemanticQueryBuilder.

This comes back to the thing I've often talked about: it's better to make the parser quite forgiving, accepting more things than what are actually legal in the language, and then detect illegal things later, where we can easily report more meaningful errors. The reason is that generated parsers typically report syntax errors in a way that's not very helpful to the user.