[FIR] KT-57665: Make dynamic members' parameters dynamic

Parameter types are not only used "to accept" some data,
but they also are used as inputs for inference
(expected types)

^KT-57665 Fixed

compiler/testData/diagnostics/testsWithJsStdLib/dynamicUnresolved.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // ISSUE: KT-57665
 // DIAGNOSTICS: -UNUSED_PARAMETER