Changing selectExprNeedsAlias to consider string literal quotes
#2710
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When fixing a string literal quoting issue in Doltgres (dolthub/doltgresql#868), table functions stopped working, because the
selectExprNeedsAliasstarted returningtrueto indicate that an alias was needed (even though it wasn't) and thebuildTableFuncfunction would fail.This started happening because the quoted string literals no longer matched
InputExpression, sinceInputExpressionalways trims off quotes when it is assigned. Another solution could be to expose thetrimQuotesfunction from Vitess and use it to trimexpr.String()before matching againstInputExpression.