deploy documentation in qiskit.org/ecosystem

[1ucian0]

Similar to Qiskit/qiskit-aer#1748, see Qiskit/qiskit.org#3038 for more context

Summary

The Qiskit Ecosystem lives in qiskit.org/ecosystem and new place for qiskit related projects that are not technically Qiskit. This PR adds that destination for documentation deployment.

Details and comments

For now, a copy of the same docs in ecosystem would allow to have both q.o/documentation and q.o/ecosystem for testing that everything is fine. Once that's done, the CDN will redirects to the new location and the deploy to q.o/documentation can be removed.

[coruscating]

@1ucian0 will the /documentation to /ecosystem redirect persist forever so that links that are hard to update aren't broken?

[1ucian0]

will the /documentation to /ecosystem redirect persist forever so that links that are hard to update aren't broken?

yes

[coruscating]

@1ucian0 Thanks for this! I updated the link in a few more places and the dev branch docs build script too. If this looks good to you then we can merge.

[coruscating]

@1ucian0 I've reverted the link changes, does it look ok now?

[mtreinish]

This looks fine to me, since the redirect is now in place we probably don't need dual upload anymore since only one path is externally accessible. Also, we probably should update the URLs in the links. But we can do that in a follow up easily enough.

[mtreinish]

I've temporarily removed this from the merge queue because I'm running a manual rclone to update the copy of the docs at ecosystem/ from the current version at documentation/ after that finishes I'll re-enqueue it.