* Include `pin*` extras in lockfile
* Fix and clean up `devscripts/update_requirements.py`
* Improve release channel documentation
* Remove false statement from `--prefer-insecure` documentation
* Assorted code cleanup
* Set `GH_TELEMETRY=false` in CI/CD whenever `gh` is used
* Add comments about required checks in CI workflows
* Run `test-workflows.yml` for every PR so its checks can be required
* Verify actionlint attestation in CI
* Remove zizmor version to reduce workflow maintenance burden
(zizmor-action handles pinning on its end)
Authored by: bashonly
`Brightcove` is difficult to migrate because it's subclasses may depend
on the signature of the current functions. So it is left as-is for now
Note: Tests have not been migrated
Using https://github.com/asottile/pyupgrade
1. `__future__` imports and `coding: utf-8` were removed
2. Files were rewritten with `pyupgrade --py36-plus --keep-percent-format`
3. f-strings were cherry-picked from `pyupgrade --py36-plus`
Extractors are left untouched (except removing header) to avoid unnecessary merge conflicts
* All modules and binary names are changed
* All documentation references changed
* yt-dlp no longer loads youtube-dlc config files
* All URLs changed to point to organization account
Co-authored-by: Pccode66
Co-authored-by: pukkandan
