Parser regression with top level treat expressions

[Mobe91]

An entity-view mapping @Mapping("TREAT(parent AS BaseProduct)") fails to parse with 1.4.0-Alpha2 that previously worked.

Also, the parser does not restore the original whitespaces in an expression when it throws a SyntaxErrorException.

Caused by: com.blazebit.persistence.parser.expression.SyntaxErrorException: A top level treat expression is not allowed. Consider to further dereference the expression: TREAT(parentASBaseProduct)
	at com.blazebit.persistence.parser.expression.JPQLNextExpressionVisitorImpl.visitPathExpression(JPQLNextExpressionVisitorImpl.java:599)
	at com.blazebit.persistence.parser.expression.JPQLNextExpressionVisitorImpl.visitPathExpression(JPQLNextExpressionVisitorImpl.java:56)
	at com.blazebit.persistence.parser.JPQLNextParser$PathExpressionContext.accept(JPQLNextParser.java:6638)
	at com.blazebit.persistence.parser.expression.JPQLNextExpressionVisitorImpl.visitParseExpression(JPQLNextExpressionVisitorImpl.java:94)
	at com.blazebit.persistence.parser.expression.JPQLNextExpressionVisitorImpl.visitParseExpression(JPQLNextExpressionVisitorImpl.java:56)
	at com.blazebit.persistence.parser.JPQLNextParser$ParseExpressionContext.accept(JPQLNextParser.java:408)
	at com.blazebit.persistence.parser.antlr.tree.AbstractParseTreeVisitor.visit(AbstractParseTreeVisitor.java:18)
	at com.blazebit.persistence.parser.expression.AbstractExpressionFactory.createExpression(AbstractExpressionFactory.java:186)
	at com.blazebit.persistence.parser.expression.AbstractExpressionFactory.createSimpleExpression(AbstractExpressionFactory.java:213)
	at com.blazebit.persistence.parser.expression.AbstractCachingExpressionFactory$2.get(AbstractCachingExpressionFactory.java:56)
	at com.blazebit.persistence.parser.expression.AbstractCachingExpressionFactory.getOrDefault(AbstractCachingExpressionFactory.java:158)
	at com.blazebit.persistence.parser.expression.AbstractCachingExpressionFactory.createSimpleExpression(AbstractCachingExpressionFactory.java:109)
	at com.blazebit.persistence.view.impl.MacroConfigurationExpressionFactory.createSimpleExpression(MacroConfigurationExpressionFactory.java:67)
	at com.blazebit.persistence.parser.expression.AbstractExpressionFactoryMacroAdapter.createSimpleExpression(AbstractExpressionFactoryMacroAdapter.java:66)
	at com.blazebit.persistence.view.impl.metamodel.AbstractAttribute.getCollectionJoinMappings(AbstractAttribute.java:395)
	at com.blazebit.persistence.view.impl.metamodel.ManagedViewTypeImpl.checkAttributes(ManagedViewTypeImpl.java:391)
	at com.blazebit.persistence.view.impl.metamodel.ViewMetamodelImpl.<init>(ViewMetamodelImpl.java:103)
	at com.blazebit.persistence.view.impl.EntityViewManagerImpl.<init>(EntityViewManagerImpl.java:166)