Generate `Log4jPlugins` class does not compile in JPMS

Currently `log4j-plugin-processor` in version `3.0.0-beta3` of Log4j Core adds [BND annotations](https://bnd.bndtools.org/chapters/230-manifest-annotations.html) to the generated code.

While these might be useful for OSGi users, they cause a compilation error if the `biz.aQute.bnd.annotation` module is not present:

- On the compiler classpath,
- A `static` dependency on the module is not declared in the `module-info.java` file.

Start by inspecting the log4j-plugin-processor output for the generated Log4jPlugins class and the relevant module-info.java configuration. Reproduce compilation with biz.aQute.bnd.annotation absent from the compiler classpath; done means the generated class compiles in JPMS without an undeclared static module dependency.

Written by the indexing model from the issue text.