Update all documentation to reference the new hosting service modules.
Review Request #13187 — Created Aug. 2, 2023 and submitted
This updates all docs in the codebase to reference the modern paths for
the base hosting sevice support, and fixes up some existing
documentation issues (namely duplicate signatures). This ensures that
there are no new warnings from the hosting service work in our doc
builds, and that people working on extensions will see the intended
modules and classes.
All unit tests pass.
Built the docs, and didn't see any warnings related to hosting service