we introduced new javadoc AST in scope of #17514

Now it is time to migrate MissingJavadocTypeCheck Check to use AST, rather than regexp for parsing of javadoc.

Whole design should stay as is, same properties.
But check should extend extends AbstractJavadocCheck and do all logic based on AST nodes.
There are already bunch of Checks that doing this, so look around for examples.

remove suppresion that is mentioned at #11166