Fix #851 (#1110)

* Fix doc

* Formatting fixes and bump prio if host functions are detected

* Add canvas

* Bump canvas-kusama's runtime version to 800

* Add db migrations

* Prepare for client releases

* Split the upload of the context artifact

* Rename of the srtool digests to match script default expectations

* Fix runtime name for canvas

* Fix jobs dependencies when skipping jobs/steps for client builds

* Fix CI for the client builds

* Fix issue when building in client mode

* Bump checkout action to v3 and gate some tests

* Fix notification

ref #851