ref(build): Switch from using rollup-plugin-re to rollup-plugin-cleanup

[lobsterkatie]

This is based on #5799, but preserves comments in out built output and cleans up a few comments in the plugin file.

[lforst]

As far as I can remember the outcome of the discussion was that we want to remove as much complexity from the build-process as possible. Adding the cleanup plugin is adding complexity again. To me, the output isn't ugly enough to justify adding a dependency in one of the most fragile steps.

[lobsterkatie]

As far as I can remember the outcome of the discussion was that we want to remove as much complexity from the build-process as possible. Adding the cleanup plugin is adding complexity again. To me, the output isn't ugly enough to justify adding a dependency in one of the most fragile steps.

The fact that sucrase is determined to not change line numbers between original and built files means that the files do come out looking kind of funky. And honestly, using this plugin to fix line endings and delete blank lines is one of the least complex parts of the process, either to understand as a reader or to introduce potential for bugs. I think it's worth it.