IDEA-243546 Allow local interfaces and enums on language level 15-preview (part of JEP 384)

Also: fix non-static access checks for local interfaces/enums/records (JEP 384)
Also: i18n of error messages

GitOrigin-RevId: 40448f089229d77e32eb200b4011e1aea09391b0

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/localInterfaceEnum/LocalInterface.java

@@ -0,0 +1,60 @@
+class X {
+  void ok() {
+    interface Foo {
+      void m();
+      default void m2() {}
+      static void m3() {}
+    }
+    Foo foo = () -> {};
+  }
+  
+  void modifiers() {
+    <error descr="Modifier 'static' not allowed here">static</error> interface Intf1 {}
+    <error descr="Modifier 'private' not allowed here">private</error> interface Intf2 {}
+    <error descr="Modifier 'public' not allowed here">public</error> interface Intf3 {}
+    <error descr="Modifier 'protected' not allowed here">protected</error> interface Intf3 {}
+    abstract interface Intf4 {}
+    strictfp interface Intf5 {}
+    <error descr="Modifier 'final' not allowed here">final</error> interface Intf6 {}
+  }
+  
+  static int sf = 0;
+  
+  int f = 2;
+  
+  void capture() {
+    int l = 5;
+    final int cst = 2;
+    
+    interface Foo {
+      int x = 2;
+      void m();
+      default void m2() {
+        System.out.println(<error descr="Non-static variable 'l' cannot be referenced from a static context">l</error>);
+        System.out.println(<error descr="Non-static field 'f' cannot be referenced from a static context">f</error>);
+        System.out.println(sf);
+        System.out.println(x);
+        System.out.println(<error descr="Non-static variable 'cst' cannot be referenced from a static context">cst</error>);
+      }
+    }
+    
+  }
+  
+  static <T> void typeParameter() {
+    interface Foo extends I<String> {
+      <error descr="'T' cannot be referenced from a static context">T</error> t = null;
+    }
+    interface Foo1 extends I<<error descr="'T' cannot be referenced from a static context">T</error>> {}
+  }
+  
+  interface I<Y> {}
+  
+  class Box<PARAM> {
+    void test() {
+      interface LocalI {
+        <error descr="'X.Box.this' cannot be referenced from a static context">PARAM</error> getParam();
+      }
+    }
+  }
+  
+}