Fix false positive "Unused symbol" for type alias & private nested class/object

#KT-21526 Fixed
 #KT-30527 Fixed

idea/testData/inspectionsLocal/unusedSymbol/companionViaImport2.kt

@@ -0,0 +1,17 @@
+// PROBLEM: none
+
+import TestClass.NamedObject.CONST
+
+class TestClass{
+    fun method(){
+        CONST
+    }
+
+    private object NamedObject<caret> {
+        const val CONST = "abc"
+    }
+}
+
+fun main(){
+    TestClass().method()
+}

idea/testData/inspectionsLocal/unusedSymbol/innerClass.kt

@@ -0,0 +1,19 @@
+// PROBLEM: none
+
+import MVE.Used.Companion.doStuff1
+
+fun main() {
+    MVE("").test()
+}
+
+data class MVE(private val parameter: CharSequence) {
+    fun test() = parameter.doStuff1()
+
+    private data class Used<caret>(val parameter: CharSequence) {
+        companion object {
+            fun CharSequence.doStuff1() = Used(this).doStuff2()
+        }
+
+        private fun doStuff2() = ""
+    }
+}

idea/testData/inspectionsLocal/unusedSymbol/typeAlias.kt

@@ -0,0 +1,12 @@
+// PROBLEM: none
+
+import Other.HELLO
+
+val ONE = HELLO
+
+enum class MyEnum {
+    HELLO,
+    WORLD
+}
+
+typealias Other<caret> = MyEnum

idea/testData/quickfix/removeUnused/companionViaImport3.kt

@@ -0,0 +1,8 @@
+// "Safe delete 'NamedObject'" "true"
+import TestClass.NamedObject
+
+class TestClass{
+    private object NamedObject<caret> {
+        const val CONST = "abc"
+    }
+}

idea/testData/quickfix/removeUnused/companionViaImport3.kt.after

@@ -0,0 +1,4 @@
+// "Safe delete 'NamedObject'" "true"
+
+class TestClass{
+}

idea/testData/quickfix/removeUnused/typeAlias2.kt

@@ -0,0 +1,9 @@
+// "Safe delete 'Other'" "true"
+import Other
+
+enum class MyEnum {
+    HELLO,
+    WORLD
+}
+
+typealias Other<caret> = MyEnum

idea/testData/quickfix/removeUnused/typeAlias2.kt.after

@@ -0,0 +1,7 @@
+// "Safe delete 'Other'" "true"
+
+enum class MyEnum {
+    HELLO,
+    WORLD
+}
+