fix: for crates.io versions, use max_stable_version if it exists [CRATES]

[zeeshanlakhani]

Proposal to fix/handle #8666.

[chris48s]

Thanks for submitting this and the extra info in #8666 . There are couple of problems here:

1. CircleCI isn't running the service tests from your fork. This is a known issue affecting some contributors. We're working on migrating away from it (hence the current random mashup of GH actions and Circle CI)
2. Looking at this code has made me realise there is another issue here.

I've moved this change to PR #8687 but I've left you as the commit (co-)author