Call factory method for primary constructors of inner classes

We might want to add 'init' blocks later, so now, for the sake of
binary compatibility with 1.3-RC binaries, we have to generate these
'constructor' calls.

Note that in some tests inline class boxing is no longer redundant,
because resulting value is passed to 'constructor' as an argument.

compiler/testData/codegen/bytecodeText/inlineClasses/boxInlineClassInsideElvisWithNullConstant.kt

@@ -12,6 +12,7 @@ fun f() {
 
 // @TestKt.class:
 // 0 INVOKESTATIC UInt\$Erased.box
+// 0 INVOKESTATIC UInt\.box
 // 0 INVOKEVIRTUAL UInt.unbox
 // 0 valueOf
 // 0 intValue

compiler/testData/codegen/bytecodeText/inlineClasses/boxResultInlineClassOfConstructorCall.kt

@@ -16,6 +16,7 @@ fun test() {
 
 // @TestKt.class:
 // 0 INVOKESTATIC Result\$Erased.box
+// 2 INVOKESTATIC Result\.box
 // 0 INVOKEVIRTUAL Result.unbox
 
 // 2 valueOf

compiler/testData/codegen/bytecodeText/inlineClasses/primaryConstructorCalledByInlineClass.kt

@@ -0,0 +1,10 @@
+// !LANGUAGE: +InlineClasses
+
+// FILE: Z.kt
+inline class Z(val x: Int)
+
+// FILE: test.kt
+fun testZ() = Z(42)
+
+// @TestKt.class:
+// 1 INVOKESTATIC Z\.constructor \(I\)I

compiler/testData/codegen/bytecodeText/inlineClasses/unboxInlineClassFromParameterizedType.kt

@@ -27,6 +27,7 @@ fun test(asInt: Result<Int>, asString: Result<String>, asResult: Result<Result<I
 
 // @TestKt.class:
 // 0 INVOKESTATIC Result\$Erased.box
+// 0 INVOKESTATIC Result\.box
 // 3 INVOKEVIRTUAL Result.unbox
 
 // 0 valueOf