Don't generate empty constructor if there is secondary one with empty parameter list

compiler/testData/diagnostics/tests/secondaryConstructors/noDefaultIfEmptySecondary.kt

@@ -0,0 +1,4 @@
+// do not report generate empty synthetic constructor by primary as it leads to CONFLICTING_JVM_DECLARATIONS
+class A(val x: Int = 1, val y: Int = 2) {
+    constructor(): this(0, 0) {}
+}