Check docker hashes parallel and safe roughly 1 second every time

[christoph-zededa]

Description

Check linuxkit tags in parallel and save time.

PR dependencies

https://github.com/linuxkit/linuxkit/pull/4130

How to test and validate this PR

make any docker hash inconsistent and run

make check-docker-hashes-consistency

Changelog notes

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PR Backports

Checklist

• [x] I've provided a proper description
• [x] I've added the proper documentation
• [x] I've tested my PR on amd64 device
• [ ] I've tested my PR on arm64 device
• [x] I've written the test verification instructions
• [ ] I've set the proper labels to this PR

And the last but not least:

• [ ] I've checked the boxes above, or I've provided a good reason why I didn't check them.

Please, check the boxes above after submitting the PR in interactive mode.

[christoph-zededa]

/rerun red

[christoph-zededa]

Do we save one second for the whole build, or one second for each Docker file we check?

For the whole build ;-) - so closing without merging is fine, too.

I just wanted to try out the parallel linuxkit (and I found a bug: https://github.com/linuxkit/linuxkit/pull/4130 )

[OhmSpectator]

@christoph-zededa can we easily fix the issue, reported by OSV?

[christoph-zededa]

@christoph-zededa can we easily fix the issue, reported by OSV?

let's see, perhaps now ...