new stable plugins require generated named_components.json file which contains all analysis components implemented by this plugin. The generation is currently done in build-tools by elasticsearch.stable-esplugin
However this makes the generation only available for plugins using gradle. Plugin developers using maven or other building tooling will not be able to use it.
This commits refactors the scanning logic into libs:plugin-scanner which will allow for plugin install command to perform the scanning too.
relates #88980
