Forbid lateinit variables of inline class types

Proper support of lateinit inline class values will be added later,
 see #KT-23814

 #KT-25603 Fixed

compiler/testData/diagnostics/tests/inlineClasses/lateinitInlineClasses.kt

@@ -0,0 +1,10 @@
+// !LANGUAGE: +InlineClasses
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+inline class Foo(val x: Int)
+
+<!INAPPLICABLE_LATEINIT_MODIFIER!>lateinit<!> var a: Foo
+
+fun foo() {
+    <!INAPPLICABLE_LATEINIT_MODIFIER!>lateinit<!> var b: Foo
+}

compiler/testData/diagnostics/tests/inlineClasses/lateinitInlineClasses.txt

@@ -0,0 +1,12 @@
+package
+
+public lateinit var a: Foo
+public fun foo(): kotlin.Unit
+
+public final inline class Foo {
+    public constructor Foo(/*0*/ x: kotlin.Int)
+    public final val x: kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/testsWithUnsignedTypes/lateinitUnsignedType.kt

@@ -0,0 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+<!INAPPLICABLE_LATEINIT_MODIFIER!>lateinit<!> var a: UInt
+
+fun foo() {
+    <!INAPPLICABLE_LATEINIT_MODIFIER!>lateinit<!> var b: UByte
+    <!INAPPLICABLE_LATEINIT_MODIFIER!>lateinit<!> var c: UShort
+    <!INAPPLICABLE_LATEINIT_MODIFIER!>lateinit<!> var d: ULong
+}

compiler/testData/diagnostics/testsWithUnsignedTypes/lateinitUnsignedType.txt

@@ -0,0 +1,4 @@
+package
+
+public lateinit var a: kotlin.UInt
+public fun foo(): kotlin.Unit