Update to elastic/beats@ba6d176

[axw]

Remove mage.DMG-related bits, removed from libbeat in elastic/beats#30097

[mergify]

This pull request does not have a backport label. Could you fix it @axw? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-7.x is the label to automatically backport to the 7.x branch.
• backport-7./d is the label to automatically backport to the 7./d branch. /d is the digit

NOTE: backport-skip has been added to this pull request.

[apmmachine]

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• Start Time: 2022-02-07T06:28:41.525+0000

• Duration: 85 min 44 sec

Test stats 🧪

Test	Results
Failed	0
Passed	5374
Skipped	18
Total	5392

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