HHH-18575 Fix IllegalStateException while passing multi-valued BigDecimal as parameter

Fix
```
java.lang.IllegalStateException: Binding is multi-valued; illegal call to #getBindValue

	at org.hibernate.query.internal.QueryParameterBindingImpl.getBindValue(QueryParameterBindingImpl.java:100)
	at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.resolveSqmParameter(BaseSqmToSqlAstConverter.java:6283)
	at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.consumeSqmParameter(BaseSqmToSqlAstConverter.java:5861)
	at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.consumeSingleSqmParameter(BaseSqmToSqlAstConverter.java:5950)
	at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.processInSingleParameter(BaseSqmToSqlAstConverter.java:8178)
	at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.processInSingleHqlParameter(BaseSqmToSqlAstConverter.java:8135)
	at org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter.processInListWithSingleParameter(BaseSqmToSqlAstConverter.java:8124)
```

Author: quaff

hibernate-core/src/main/java/org/hibernate/query/sqm/sql/BaseSqmToSqlAstConverter.java

@@ -6297,7 +6297,14 @@ else if ( bindable instanceof SelectableMapping ) {
 					final QueryParameterBinding<?> binding = domainParameterBindings.getBinding(
 							domainParameterXref.getQueryParameter( expression )
 					);
-					final Object bindValue = binding.getBindValue();
+					final Object bindValue;
+					if ( binding.isMultiValued() ) {
+						final Collection<?> bindValues = binding.getBindValues();
+						bindValue = !bindValues.isEmpty() ? bindValues.iterator().next() : null;
+					}
+					else {
+						bindValue = binding.getBindValue();
+					}
 					if ( bindValue != null ) {
 						if ( bindValue instanceof BigInteger ) {
 							int precision = bindValue.toString().length() - ( ( (BigInteger) bindValue ).signum() < 0 ? 1 : 0 );