Consolidate `quickcheck-docs` and `publish-zrepl-github-io` jobs into a
single parameterized `run-docs-publish-sh` job with a `push` boolean.
Don't run `make docs` anymore, it's run by `publish.sh` internally
anyway.
The cimg includes `make`, and we don't need Go to build the docs.
Drive-by update to `cimg/base:current` - we pinned all important build
inputs for docs using `uv`, and the inputs we use from the `cimg`
(git, make) are stable.
Christian Schwarz
17805e32c2