Use type substitution when matching header-impl members

Previously, type substitution, which is critical for matching generic
header/impl members with each other, was only performed when
checkImplementationHasHeaderDeclaration was called for impl class
(areCompatibleClassifiers creates the correct substitutor). This was
done in areCompatibleClassifiers: a substitutor which maps type
parameters of the header class to type parameters of the impl class was
created.

Now we create the same substitutor when
checkImplementationHasHeaderDeclaration is called for an impl member of
an impl class as well, manually.

 #KT-15230 Fixed

compiler/testData/diagnostics/tests/multiplatform/generic/membersInGenericClass.kt

@@ -0,0 +1,18 @@
+// !LANGUAGE: +MultiPlatformProjects
+// MODULE: m1-common
+// FILE: common.kt
+
+header interface A<T> {
+    val x: T
+    var y: List<T>
+    fun f(p: Collection<T>): Map<T, A<T?>>
+}
+
+// MODULE: m2-jvm(m1-common)
+// FILE: jvm.kt
+
+impl interface A<T> {
+    impl val x: T
+    impl var y: List<T>
+    impl fun f(p: Collection<T>): Map<T, A<T?>>
+}

compiler/testData/diagnostics/tests/multiplatform/generic/membersInGenericClass.txt

@@ -0,0 +1,24 @@
+// -- Module: <m1-common> --
+package
+
+public header interface A</*0*/ T> {
+    public header abstract val x: T
+    public header abstract var y: kotlin.collections.List<T>
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract header fun f(/*0*/ p: kotlin.collections.Collection<T>): kotlin.collections.Map<T, A<T?>>
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+
+// -- Module: <m2-jvm> --
+package
+
+public impl interface A</*0*/ T> {
+    public impl abstract val x: T
+    public impl abstract var y: kotlin.collections.List<T>
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract impl fun f(/*0*/ p: kotlin.collections.Collection<T>): kotlin.collections.Map<T, A<T?>>
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}