FIR: Unwrap type aliases in type arguments

compiler/fir/analysis-tests/testData/resolve/types/typeAliasInArguments.fir.txt

@@ -0,0 +1,7 @@
+FILE: main.kt
+    public final typealias ImmutableMap<K, V> = R|MyMap<K, V>|
+    public final typealias ImmutableSet<E> = R|MySet<E>|
+    private final typealias ImmutableMultimap<K, V> = R|ImmutableMap<K, ImmutableSet<V>>|
+    private final fun <K, V> R|ImmutableMultimap<K, V>|.put(key: R|K|, value: R|V|, oldSet: R|ImmutableSet<V>|): R|ImmutableMultimap<K, V>| {
+        ^put this@R|/put|.R|SubstitutionOverride</MyMap.put: R|ft<MyMap<ft<K, K?>, ft<ImmutableSet<V>, ImmutableSet<V>?>>, MyMap<ft<K, K?>, ft<ImmutableSet<V>, ImmutableSet<V>?>>?>|>|(R|<local>/key|, R|<local>/oldSet|.R|SubstitutionOverride</MySet.add: R|ft<MySet<ft<V, V?>>, MySet<ft<V, V?>>?>|>|(R|<local>/value|))
+    }

compiler/fir/analysis-tests/testData/resolve/types/typeAliasInArguments.kt

@@ -0,0 +1,21 @@
+// FILE: MyMap.java
+
+public interface MyMap<K, V> {
+    public MyMap<K, V> put(K k, V v);
+}
+// FILE: MySet.java
+
+public interface MySet<E> {
+    public MySet<E> add(E e);
+}
+
+// FILE: main.kt
+
+typealias ImmutableMap<K, V> = MyMap<K, V>
+typealias ImmutableSet<E> = MySet<E>
+
+private typealias ImmutableMultimap<K, V> = ImmutableMap<K, ImmutableSet<V>>
+
+private fun <K, V> ImmutableMultimap<K, V>.put(key: K, value: V, oldSet: ImmutableSet<V>): ImmutableMultimap<K, V> {
+    return put(key, oldSet.add(value))
+}