[FIR] Unwrap captured types in target type of SAM conversion

^KT-66256 Fixed

compiler/testData/codegen/box/sam/inProjectedSam.kt

@@ -0,0 +1,18 @@
+// ISSUE: KT-66256
+
+fun interface Element {
+    fun invoke()
+}
+
+class Container<T> {
+    fun add(arg: T) {}
+}
+
+fun test(c: Container<in Element>) {
+    c.add({})
+}
+
+fun box(): String {
+    test(Container())
+    return "OK"
+}