Don't warn about missing tag description on void methods

GitOrigin-RevId: 7125c41e5adfb4a45f96b6f5c9b6db12a9a0da6d

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/javaDoc/Return1.java

@@ -0,0 +1,6 @@
+class Test {
+  /**
+   * <warning descr="Tag 'return' is not allowed here">@return</warning>
+   */
+  public void foo() {}
+}