[FIR] Set correct constraint position for callable reference

This fixes a false positive resolution error for callable references
to functions with a type parameter that's annotated with
@OnlyInputTypes.

#KT-57994 Fixed

compiler/testData/diagnostics/tests/callableReference/resolve/onlyInputTypesOnCallableReference.kt

@@ -0,0 +1,17 @@
+// FIR_IDENTICAL
+// SKIP_TXT
+// WITH_STDLIB
+
+open class BaseClass
+class DerivedClass : BaseClass()
+
+fun test() {
+    val derivedToStringMap: Map<DerivedClass, String> = mapOf()
+    val mapper: (BaseClass) -> String? = derivedToStringMap::get
+
+    foo(mapper)
+    foo(derivedToStringMap::get)
+}
+
+
+fun foo(mapper: (BaseClass) -> String?) {}