FIR: add implicit primary constructors, add delegated types to them

So #KT-24088 In Progress

compiler/testData/fir/rawBuilder/declarations/noPrimaryConstructor.kt

@@ -0,0 +1,9 @@
+class NoPrimary {
+    val x: String
+
+    constructor(x: String) {
+        this.x = x
+    }
+
+    constructor(): this("")
+}