[Lombok] Make visibility of fields of @Value classes private by default (K1)

^KT-51092

plugins/lombok/testData/box/valueFieldAccess.kt

@@ -0,0 +1,18 @@
+// IGNORE_BACKEND_K2: JVM_IR
+// ISSUE: KT-51092
+// FILE: MyValue.java
+import lombok.Value;
+
+@Value
+public class MyValue {
+    String defaultValue;
+    private String privateValue;
+    public String publicValue;
+}
+
+// FILE: main.kt
+fun box(): String {
+    val x = MyValue("A", "B", "C")
+    val result = x.defaultValue + x.privateValue + x.publicValue;
+    return if (result == "ABC") "OK" else "Error: $x"
+}