[7.13] docs: backport 5185

[bmorelli25]

Backports the following commits from #5185:

• grammar or stuff that isn’t built to apm-server 8ec0ff4
• backport to 7.12 4f3d929
• backport to 7.13 f50d4eb
• Update docs/copied-from-beats/docs/shared-path-config.asciidoc 4196629

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• Build Cause: Pull request #5221 opened

• Start Time: 2021-05-03T22:33:06.625+0000

• Duration: 46 min 13 sec

• Commit: 34599b4

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Failed	0
Passed	4811
Skipped	121
Total	4932

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