Do not suppress errors when resolving references in an ORDER BY clause

Do not suppress errors when resolving references in an ORDER BY clause
belonging to a compound SELECT within a view or trigger within ALTER
TABLE. Fix for ticket [a10a14e9b4ba2].
Also, in the event of a semantic error in an aggregate query, early-out the
resetAccumulator() function to prevent problems due to incomplete or
incorrect initialization of the AggInfo object.
Fix for ticket [af4556bb5c285c08].

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