ROX-30260: add support for arm64 [upstream]

[Stringy]

Description

Adds ARM support to Fact, including multi-arch upstream builds and testing.

• fcarm VMs added to integration testing.
• arch-specific vmlinux added (arm vmlinux generated from fedora-coreos arm VM).
• minor changes to build script and event parsing.

Downstream (konflux) changes to follow.

Checklist

• Investigated and inspected CI test results
• Updated documentation accordingly

Testing Performed

Manually spun up arm Fact on a Fedora CoreOS machine to verify the returned events, otherwise relying on CI tests.

[Stringy]

I'm going to revert this hacky thing the moment I create the new branch to add arm support to the konflux builds. It's only here because merging this PR with broken konflux would be a Bad Thing™️ , and we don't need it once everything supports arm

[Stringy]

I'm sure we'd fixed the GCP zone capacity issues already, but seems that it's still a problem. I'm not sure there's much we can do about it from this repo, however.

[Molter73]

Thanks for tackling this one, just left a few comments but mostly LGTM!

[Molter73]

I'm sure we'd fixed the GCP zone capacity issues already, but seems that it's still a problem. I'm not sure there's much we can do about it from this repo, however.

We did and we didn't: stackrox/collector#2358 (comment)

I'm not 100% sure how we could address the problem in ansible on the collector repo, since that solution seems hacky and I can't think of a better solution.

[Molter73]

LGTM! Provided CI passes we can go ahead and merge.