KT-7271 Accessing an extension property of Char.Companion leads to ClassNotFoundException in runtime

#KT-7271 Fixed

compiler/testData/codegen/box/objectIntrinsics/objects.kt

@@ -25,6 +25,7 @@ fun testCompanionObjectAccess() {
     val l = Long
     val sh = Short
     val b = Byte
+    val ch = Char
     val st = String
     val en = Enum
 }
@@ -36,6 +37,7 @@ fun testInCall() {
     test(Long)
     test(Short)
     test(Byte)
+    test(Char)
     test(String)
     test(Enum)
 }

compiler/testData/codegen/boxWithStdlib/reflection/classLiterals/builtinClassLiterals.kt

@@ -10,6 +10,7 @@ fun box(): String {
 
     assertEquals("Companion", Int.Companion::class.simpleName)
     assertEquals("Companion", Double.Companion::class.simpleName)
+    assertEquals("Companion", Char.Companion::class.simpleName)
 
     assertEquals("IntRange", IntRange::class.simpleName)
 

compiler/testData/diagnostics/tests/classObjects/builtInClassObjects.kt

@@ -9,6 +9,7 @@ fun box(): String {
         val l = Long
         val sh = Short
         val b = Byte
+        val ch = Char
         val st = String
 
         test(Int)
@@ -18,6 +19,7 @@ fun box(): String {
         test(Short)
         test(Byte)
         test(String)
+        test(Char)
 
         // Common Double
         Double.POSITIVE_INFINITY

core/runtime.jvm/src/kotlin/jvm/internal/PrimitiveCompanionObjects.kt

@@ -32,6 +32,7 @@ private object IntCompanionObject {}
 private object LongCompanionObject {}
 private object ShortCompanionObject {}
 private object ByteCompanionObject {}
+private object CharCompanionObject {}
 
 private object StringCompanionObject {}
 private object EnumCompanionObject {}

js/js.libraries/src/internal/primitiveCompanionObjects.kt

@@ -32,6 +32,7 @@ private object IntCompanionObject {}
 private object LongCompanionObject {}
 private object ShortCompanionObject {}
 private object ByteCompanionObject {}
+private object CharCompanionObject {}
 
 private object StringCompanionObject {}
 private object EnumCompanionObject {}

libraries/stdlib/test/DefaultIntrinsicObjectsJVMTest.kt

@@ -73,6 +73,12 @@ class CompanionObjectsExtensionsTest {
         assertEquals(java.lang.Byte.MIN_VALUE, Byte.MIN_VALUE)
     }
 
+    test fun charTest() {
+        val ch = Char
+
+        assertEquals(ch, Char)
+    }
+
     test fun stringTest() {
         val s = String