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 */ }
+    }
+}

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

@@ -0,0 +1,27 @@
+package test
+
+class SecondaryConstructors(x: Boolean) {
+    init {
+    }
+
+    anno constructor(x: String) : this(x == "abc") {
+    }
+
+    init {
+    }
+
+    private constructor(x: Int) : this(x < 0) {
+    }
+
+    inner class Inner<T : String, G : Int> where G : Number {
+        constructor(x: T, g: G) {
+        }
+    }
+
+    class Nested {
+        anno constructor(z: Int) {}
+        internal constructor() {}
+    }
+}
+
+annotation class anno