[FIR2IR] Properly insert casts for smartcasts in argument position

Previously cast inserter didn't consider expected type for arguments
  of function calls

^KT-63257 Fixed

compiler/testData/codegen/box/smartCasts/smartcastFromGenericToString.kt

@@ -0,0 +1,22 @@
+// ISSUE: KT-62863
+// FIR_IDENTICAL
+// WITH_STDLIB
+// DUMP_IR
+
+class Some<V : Any>(val map: Map<String, V>) {
+    fun test(key: String): String {
+        return when (val value = map.getValue(key)) {
+            is String -> addK(value)
+            else -> "Fail: $value"
+        }
+    }
+
+    fun addK(s: String): String {
+        return s + "K"
+    }
+}
+
+fun box(): String {
+    val x = Some<String>(mapOf("key" to "O"))
+    return x.test("key")
+}