[8.0](backport #28813) Packaging: rename arm64 suffix to aarch64 in the tar.gz artifacts ONLY

[mergify]

On HOLD, @mgreau will give us green light

This is an automatic backport of pull request #28813 done by Mergify.

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[elasticmachine]

💚 Build Succeeded

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• Start Time: 2022-01-20T13:37:10.078+0000

• Duration: 166 min 58 sec

• Commit: 0392c5f

Test stats 🧪

Test	Results
Failed	0
Passed	47578
Skipped	4285
Total	51863

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[mergify]

This pull request has not been merged yet. Could you please review and merge it @v1v? 🙏

[v1v]

We have decided to stop this work for the time being and might be revisited in the future