Support default parameter values for inline class constructors and funs

#KT-26908
 #KT-26554

Move default parameter value tests to separate directory

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

@@ -0,0 +1,3 @@
+// !LANGUAGE: +InlineClasses
+
+inline class Test(val x: Int = 42)

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

@@ -0,0 +1,9 @@
+package
+
+public final inline class Test {
+    public constructor Test(/*0*/ x: kotlin.Int = ...)
+    public final val x: kotlin.Int
+    public open override /*1*/ /*synthesized*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*synthesized*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*synthesized*/ fun toString(): kotlin.String
+}