[java-inspections] CodeBlockSurrounder: disable in enum initializers

We could devise something like ((Runnable)() -> {...}).run() but this kind of code looks too ugly.
Fixes IDEA-252688 Assertion error when applying fix to assert not null in enums

GitOrigin-RevId: 6f2122acb60cfcb074cc47e6bc599626fe5547fd

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/addAssert/beforeInEnumInitializer.java

@@ -0,0 +1,6 @@
+// "Assert 'field != null'" "false"
+enum A {
+  I(field.<caret>hashCode());
+  private static Object field;
+  A(int i) {}
+}