ci: refactor CI - OSX

[wellwelwel]

See this PR also as a discussion based on "osx is a low priority and intended to be a smoke test" comment.

It's been some time that GitHub has been failing macOS-based tests.

These false positives motivated two other PRs (#2308 and #2348), but the problem isn't really with the CI.

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Since the tests "against" the MySQL Server already take place in CI - Linux, I would like to propose that the test focus on Node.js versions for macOS-based tests (how it's already done in CI - Windows), reducing the chance of false positives.

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Currently, I frequently try and retry the CI - OSX until it passes without false positives.

[wellwelwel]

In this PR with less OSX jobs, it reported 2 errors until I tried again 🤔

Another suggestion could be using only the Node.js LTS:

node-version: [20.x]
mysql-version: ['mysql:8.0.33']
use-compression: [0, 1]
use-tls: [0, 1]

[sidorares]

👍