feat!: set wdqs concept URI

[rti]

Allow setting the concept URI of entities in WDQS explicitly and distinct from the hostname used to contact wikibase.

This also fixes the problem WDQS not accepting entities when the wikibase host had a DNS name different from wikibase (which should be always the case, because wikibase is not a FQDN).

Note: In deploy, items and properties in WDQS will now have the public wikibase hostname with https protocol as prefix. E.g. https://wikibase.example/

Related:

• https://phabricator.wikimedia.org/T376016
• https://github.com/wmde/wikibase-release-pipeline/issues/385
• https://phabricator.wikimedia.org/T197682
• https://phabricator.wikimedia.org/T376106

BREAKING CHANGE: env var WIKIBASE_CONCEPT_URI now mandatory to run wdqs updater

[rti]

How to handle this versioning, as discussed today with @lorenjohnson

WDQS bumps a major version

• because the interface changes the API in a breaking way
• it has a new required environment variable

Deploy bumps a patch

• deploy bumps to WDQS 2 under the hood - after this PR has been merged, released and published
• provides the required variable to WDQS
• for the user, the interface / API of deploy does not change

TODO

• ✅ clean up commit messages to signify correct version bumps to deploy and WDQS projects
• ✅ do not squash merge, use merge commits

[rti]

holding back for #782