Update documentation to describe manual installation for the new package structure
Problem to solve
Due to the new situation where installation packages are split into the runner and the helper images, the documentation is not up to date anymore. Specifically the following pages:
- https://gitlab.com/gitlab-org/gitlab-runner/-/blob/main/docs/install/linux-manually.md
- https://gitlab.com/gitlab-org/gitlab-runner/-/blob/main/docs/install/bleeding-edge.md
These pages need to be updated with the installation information for the helper images, as standalone installation of the runner will fail due to a hard dependency.
Further details
Intended documentation audience: Ops Engineers.
Proposal
Update the documentation with the new flow.
Who can address the issue
Anyone.
Other links/references
Relevant change regarding the packaging: !5190 (merged)
Related issues: