Rework various CI workflows into a single one.

Trigger on main and dev branches (1.0.x, 1.1.x, etc)

Do a maven build and install, optimized with maven buildcache.
Save generated artifacts and make them available to subsequent jobs.
Run ITs in separate jobs.

Docs: trigger antora build workflow, generate aggregate javadocs archive
and upload/unzip it.

Deploy generated artifacts to artifactory.

The workflow gets canceled if a push to the same branch happens while it's running.

Signed-off-by: Eric Bottard <[email protected]>

Author: ericbottard