Can be parameter inspection: delete only particular modifiers (e.g. no vararg) #KT-12768 Fixed

(cherry picked from commit d4116b5)

idea/testData/quickfix/canBeParameter/usedVarArg.kt

@@ -0,0 +1,5 @@
+// "Remove 'val' from parameter" "true"
+
+class Wrapper(vararg <caret>val x: Int) {
+    val y = x
+}

idea/testData/quickfix/canBeParameter/usedVarArg.kt.after

@@ -0,0 +1,5 @@
+// "Remove 'val' from parameter" "true"
+
+class Wrapper(vararg x: Int) {
+    val y = x
+}