Replace rollup-plugin-cleanup module

[kptdobe]

To shape a proper aem.js (formatting, comments cleanup...), we use rollup-plugin-cleanup plugin for rollup, but this module has not been touched for 4 years now and starts creating dependencies issues (depends on old rollup-pluginutils). We should find another solution.

The plugin is used for: (see config https://github.com/adobe/aem-lib/blob/main/rollup.config.js#L49-L52)

• make sure aem.js passes the aem-boilerplate linting rules (including: keep eslint instructions, remove // comments, line breaks, indentation)
• do not duplicate license comments (only one license at the beginning of the concatenated file)
• get rid of c8 comments