fix: add missing access checks and size limits (#39942)

Several handlers and parsers skipped checks that their siblings already
perform.

- Reject issue, comment, label, milestone and release mutations in
archived repositories via the API with one guard per route group,
matching the web UI
- Hide timeline references and dependencies pointing at issues the doer
cannot read, in the web UI and the API, including pull requests of the
same repository without pull request access
- Reject workflow runs with more than `MaxJobNumPerRun` jobs, including
inline reusable workflow jobs, and show rejected pushes as invalid
workflow runs
- Bound how much of a Helm chart archive is inflated while looking for
`Chart.yaml`

---------

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

models/actions/run_job.go

@@ -25,7 +25,6 @@ import (
 
 // MaxJobNumPerRun is the maximum number of jobs in a single run.
 // https://docs.github.com/en/actions/reference/limits#existing-system-limits
-// TODO: check this limit when creating jobs
 const MaxJobNumPerRun = 256
 
 // ActionRunJob represents a job of a run