generate getter/setter: allow public getter for public enum (IDEA-103718)

(cherry picked from commit bb95544d55937ef04d739a4c01839280a4eefb67)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/createGetterOrSetter/afterGetterForEnumField.java

@@ -0,0 +1,13 @@
+// "Create getter for '_i'" "true"
+public enum TestEnum {
+    ;
+    private final int _i;
+
+    private TestEnum(int _i) {
+        this._i = _i;
+    }
+
+    private int get_i() {
+        return _i;
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/createGetterOrSetter/beforeGetterForEnumField.java

@@ -0,0 +1,9 @@
+// "Create getter for '_i'" "true"
+public enum TestEnum {
+    ;
+    private final int _<caret>i;
+
+    private TestEnum(int _i) {
+        this._i = _i;
+    }
+}