Use arm runner

[dc-mak]

Cuts down CI time from 6 hours to like 20ish minutes.

[dc-mak]

@podhrmic

[podhrmic]

@dc-mak attests is related to building an SBOM. We don't need it quite yet, so it is OK to remove (worth speeding up the build). The changes look good, I am in favor of merging. There is a condition that if the build-and-release job passes, but combine-multiplatform fails, then the existing image manifest will be corrupted, as the hashes will be incorrect. I recommend merging as is (well, once the failed tests are fixed), and if we see these failures happening we can address it.