Fix KT-10472: compare all overloads including varargs in a single pass.

compiler/testData/diagnostics/tests/resolve/overloadConflicts/kt10472.kt

@@ -0,0 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+object Right
+object Wrong
+
+interface A<T>
+interface B<T> : A<T>
+
+fun <T> foo(vararg t: T) = Wrong
+fun <T> foo(t: A<T>) = Wrong
+fun <T> foo(t: B<T>) = Right
+
+fun test(b: B<Int>): Right = foo(b)

compiler/testData/diagnostics/tests/resolve/overloadConflicts/kt10472.txt

@@ -0,0 +1,32 @@
+package
+
+public fun </*0*/ T> foo(/*0*/ t: A<T>): Wrong
+public fun </*0*/ T> foo(/*0*/ t: B<T>): Right
+public fun </*0*/ T> foo(/*0*/ vararg t: T /*kotlin.Array<out T>*/): Wrong
+public fun test(/*0*/ b: B<kotlin.Int>): Right
+
+public interface A</*0*/ T> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface B</*0*/ T> : A<T> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public object Right {
+    private constructor Right()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public object Wrong {
+    private constructor Wrong()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}