[org] RFC: ways to move PRs forward

Currently all the cooperation between maintainers is almost exclusively limited to whatever means github offers. It seems to be working, except some PRs are stalling for months, causing fixes and features to not be merged, as well as, I guess, some contributor frustration, which may result in losing interest to the project.

I propose to

1. Set up a weekly call, or a chat, for all available maintainers to go through existing PRs (and, if needed, issues). We can pre-select a few PRs to review, and go over them in half an hour or so, weekly. I can take a burden to pre-select PRs (and/or we can use Projects kanban board for that, similar to what happens in Moby).

The alternatives are:

2. Have an IRC / Slack / Matrix / whatever channel where maintainers can poke each other (if such channel exists and is specific to runc, I am not aware of it).

3. Lower the bar for PR acceptance/merge to a single LGTM from a maintainer (perhaps even allowing the PR author themselves to LGTM their own work).

Please share your opinions @opencontainers/runc-maintainers

Start with the issue discussion and the repository's existing pull-request workflow; no specific files, tests, or entry points are named. Review the proposed maintainer coordination options and the stalled-PR problem, then document an agreed process and its ownership as the completion criteria.