Bug: --only-binary :all: should be set when locking environments

[ncoghlan]

--only-binary :all: is currently being passed to pip install when building environments, but it isn't being passed to uv pip compile when locking environments. This allows an invalid lock file to be generated that depends on source archives that the environment building step will fail to install.

This option should be added to the set of common pip arguments defined by PackageIndexConfig rather than being set in the individual CLI invocations.

[ncoghlan]

Based on https://docs.astral.sh/uv/configuration/files/, I think a potential workaround may be to create a uv.toml file alongside venvstacks.toml, containing the text:

[pip]
only-binary=":all:"

(I haven't actually tested that, though, it's just theoretical based on reading the uv configuration docs)