[java-highlighting] WIP IDEA-372969 Support JEP 512: Compact Source Files and Instance Main Methods

- update language levels partially
- fix tests

GitOrigin-RevId: 8d7b599772eda8dfd999bee9f816ec2609be4adb

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/methodRef/ResolveConflicts.java

@@ -5,7 +5,7 @@ interface Func<TIn, TOut>{
 
 class Main {
 
-    public static void main(final String[] args) {
+    public static void main() {
         Func<Integer, String> func =  Integer::<error descr="Reference to 'toString' is ambiguous, both 'toString()' and 'toString(int)' match">toString</error>;
         System.out.println(func.run(6));
     }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/methodRef/ReturnTypeSpecific.java

@@ -28,7 +28,7 @@ class MyTest {
       System.out.println(i);
     }
 
-    public static void main(String[] args) {
+    public static void main() {
         foo<error descr="Ambiguous method call: both 'MyTest.foo(I1)' and 'MyTest.foo(I2)' match">(Foo::m)</error>;
     }
 }
@@ -66,7 +66,7 @@ class MyTest1 {
         System.out.println(i);
     }
 
-    public static void main(String[] args) {
+    public static void main() {
         m<error descr="Ambiguous method call: both 'MyTest1.m(I1)' and 'MyTest1.m(I2)' match">(Foo::new)</error>;
     }
 }
@@ -103,7 +103,7 @@ class MyTest2 {
         System.out.println(i);
     }
 
-    public static void main(String[] args) {
+    public static void main() {
         m<error descr="Ambiguous method call: both 'MyTest2.m(I1)' and 'MyTest2.m(I2)' match">(Foo::new)</error>;
     }
 }

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/lambda/methodRef/VoidReturnTypeAmbiguity.java

@@ -1,6 +1,6 @@
 class App {
 
-    public static void main(String[] args) {
+    public static void main() {
         test(App::getLength);
     }