fix: Tests testAdjustQueryHaving, testQueryAndHaving, and `testQu…

…eryOrHaving` resolve wrong `eq` function

The tests falsely resolve this `eq` function

infix fun <T : Comparable<T>, V : T?, E : EntityID<T>?> Expression<in V>.eq(
        other: ExpressionWithColumnType<E>
    ): Op<Boolean> = other eq this

instead of this

infix fun <T, S1 : T?, S2 : T?> Expression<in S1>.eq(other: Expression<in S2>): Op<Boolean> = when (other as Expression<*>) {
        is Op.NULL -> isNull()
        else -> EqOp(this, other)
    }

The same happens when using `neq` instead of `eq`, so that is fixed in this commit too.

exposed-core/src/main/kotlin/org/jetbrains/exposed/sql/SQLExpressionBuilder.kt

@@ -343,7 +343,7 @@ interface ISqlExpressionBuilder {
     }
 
     /** Checks if this expression is equal to some [other] [EntityID] expression. */
-    infix fun <T : Comparable<T>, V : T?, E : EntityID<T>?> Expression<in V>.eq(
+    infix fun <T : Comparable<T>, V : T?, E : EntityID<T>?> Expression<V>.eq(
         other: ExpressionWithColumnType<E>
     ): Op<Boolean> = other eq this
 
@@ -377,7 +377,7 @@ interface ISqlExpressionBuilder {
     }
 
     /** Checks if this expression is not equal to some [other] [EntityID] expression. */
-    infix fun <T : Comparable<T>, V : T?, E : EntityID<T>?> Expression<in V>.neq(
+    infix fun <T : Comparable<T>, V : T?, E : EntityID<T>?> Expression<V>.neq(
         other: ExpressionWithColumnType<E>
     ): Op<Boolean> = other neq this