[inspections] fix false positive "Redundant Unit" inspection in lambda with dynamic return type

^KT-40700 Fixed

idea/testData/inspectionsLocal/redundantUnitExpression/dynamic6.kt

@@ -0,0 +1,10 @@
+// PROBLEM: none
+// ERROR: Unsupported [Dynamic types are not supported in this context]
+
+fun foo() {
+    fun bar(f: (Int) -> dynamic): Unit {}
+    bar {
+        val a = 1
+        Unit<caret>
+    }
+}