@Ignore annotation migration

[Philzen]

Migrate @Ignore to @Disabled (class-level and method-level).

❗ @Ignore does not disable test execution on inner public static classes. As there is no known workaround (ideas welcome!), the recipe must not migrate a class-level annotation if it contains inner public static classes unless there is a also an @Ignore annotation on every inner class or every @Test within the inner classes.

To clarify if this behavior is intended (and potentially verify if it will stay that way) i've reported this over at testng-team/testng#3138