Support secondary constructors in decompiled text

Build cls stubs for secondary constructors

idea/testData/decompiler/decompiledText/SecondaryConstructors.expected.kt

@@ -0,0 +1,20 @@
+// IntelliJ API Decompiler stub source generated from a class file
+// Implementation of methods is not available
+
+package test
+
+internal final class SecondaryConstructors(x: kotlin.Boolean) {
+    test.anno public constructor(x: kotlin.String) { /* compiled code */ }
+
+    private constructor(x: kotlin.Int) { /* compiled code */ }
+
+    internal final inner class Inner<T : kotlin.String, G : kotlin.Int> where G : kotlin.Number {
+        public constructor(x: T, g: G) { /* compiled code */ }
+    }
+
+    internal final class Nested {
+        test.anno public constructor(z: kotlin.Int) { /* compiled code */ }
+
+        internal constructor() { /* compiled code */ }
+    }
+}