Use header->impl mapping in HeaderImplDeclarationChecker.areCompatibleTypes

Construct a special TypeCheckingContext that is aware of the magic
behind the "impl typealias" that implements a "header class"

 #KT-16986 Fixed

idea/testData/multiModuleHighlighting/multiplatform/headerClassImplTypealias/common/common.kt

@@ -0,0 +1,7 @@
+package test
+
+header class Simple
+header fun createSimple(): Simple
+
+header class Generic<A, B>
+header fun <A, B> createGeneric(a: A, b: B): Generic<A, B>

idea/testData/multiModuleHighlighting/multiplatform/headerClassImplTypealias/jvm/jvm.kt

@@ -0,0 +1,9 @@
+package test
+
+class SimpleImpl
+impl typealias Simple = SimpleImpl
+impl fun createSimple(): Simple = SimpleImpl()
+
+class GenericImpl<A, B>
+impl typealias Generic<A, B> = GenericImpl<A, B>
+impl fun <A, B> createGeneric(a: A, b: B): Generic<A, B> = GenericImpl()

idea/testData/multiModuleHighlighting/multiplatform/headerFunUsesStdlibInSignature/common/common.kt

@@ -0,0 +1,11 @@
+package test
+
+header fun stringBuilder(sb: StringBuilder)
+
+header fun kotlinVersion(kv: KotlinVersion)
+
+header fun regex(r: Regex)
+
+header fun pair(p: Pair<String, List<Double>>)
+
+header fun <A, B> genericPair(p: Pair<A, B>)

idea/testData/multiModuleHighlighting/multiplatform/headerFunUsesStdlibInSignature/jvm/jvm.kt

@@ -0,0 +1,11 @@
+package test
+
+impl fun stringBuilder(sb: StringBuilder) {}
+
+impl fun kotlinVersion(kv: KotlinVersion) {}
+
+impl fun regex(r: Regex) {}
+
+impl fun pair(p: Pair<String, List<Double>>) {}
+
+impl fun <A, B> genericPair(p: Pair<A, B>) {}