KT-59504 [FIR] Check _ on destructuring declarations

Previously the checker was ignoring them, leading to missing diagnostics

^KT-59504 Fixed

compiler/testData/diagnostics/tests/functionLiterals/destructuringInLambdas/underscore.fir.kt

@@ -50,7 +50,7 @@ fun bar() {
         _ checkType { _<String>() }
     }
 
-    foo { (_: String, b) ->
+    foo { (<!COMPONENT_FUNCTION_RETURN_TYPE_MISMATCH!>_: String<!>, b) ->
         <!UNRESOLVED_REFERENCE!>_<!>.hashCode()
         b checkType { _<String>() }
     }