release-04.02.2024-07.29

🚀 What's new?

@kondracek-nr - progress on user-defined vars docs ->
@homelessbirds - fix(synthetics): editing the language for a new job manager doc ->
@homelessbirds - Merge branch 'develop' into pr/16572 ->
@homelessbirds - fix(synthetics): changed the intro ->
@homelessbirds - Merge pull request #16572 from kondracek-nr/kondracek/user-defined-vars ->