## Summary
Moving common services to respective new homes.
Resolves: https://github.com/elastic/kibana/issues/188541
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Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
## Summary

At the moment, our package generator creates all packages with the type
`shared-common`. This means that we cannot enforce boundaries between
server-side-only code and the browser, and vice-versa.
- [x] I started fixing `packages/core/*`
- [x] It took me to fixing `src/core/` type to be identified by the
`plugin` pattern (`public` and `server` directories) vs. a package
(either common, or single-scoped)
- [x] Unsurprisingly, this extended to packages importing core packages
hitting the boundaries eslint rules. And other packages importing the
latter.
- [x] Also a bunch of `common` logic that shouldn't be so _common_ 🙃
### For maintainers
- [x] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)
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Co-authored-by: kibanamachine <42973632+kibanamachine@users.noreply.github.com>