Only use the newer Solidus event system

[waiting-for-dev]

Summary

The old one has been removed on v4.0.

We'll need a major release after this change is merged.

See solidusio/solidus#5024

We're also fixing CI with different changes to our CircleCI config:

• Run different Solidus versions on different jobs for better error handling.
• We're now explicitly providing the ruby version to the executor while using a matrix configuration for better extensibility.

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[kennyadsl]

@waiting-for-dev specs are failing in the "solidus-older" build against 3.1. But the latest version of the orb doesn't have that version anymore, because it's unsupported. But we are using the @volatile tag, so it should pick the last orb version. Not sure what's happening here.

[waiting-for-dev]

@waiting-for-dev specs are failing in the "solidus-older" build against 3.1. But the latest version of the orb doesn't have that version anymore, because it's unsupported. But we are using the @volatile tag, so it should pick the last orb version. Not sure what's happening here.

Thanks for looking into it, @kennyadsl. I think we need a new release for the orb, which is automatically generated when tagged via GH UI/API. I just did it, see https://github.com/solidusio/circleci-orbs-extensions/releases/tag/v0.7.3. I'll re-run the build once the orb is published.

[elia]

Thoughts on dropping support for the failing solidus 3.1?

[waiting-for-dev]

Thoughts on dropping support for the failing solidus 3.1?

Yeah, the last orb doesn't cover it anymore.