Get metricbeat to compile on AIX

[fearful-symmetry]

What does this PR do?

This is a handful of updates to get metricbeat compiling on AIX. I'm not saying metricbeat works on AIX, but now it will compile.

What's in here?

• Updates for various vendor libraries that have recent AIX support
• A few fixes to make those newer libraries work
• Exclusion of cloudfoundry, azure, k8s, and docker code on AIX, as those libraries currently aren't building on AIX.
• A few build tag fixes

Why is it important?

We'd like to get this working.

Checklist

• My code follows the style guidelines of this project
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

[elasticmachine]

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• Start Time: 2021-10-18T22:27:05.380+0000

• Duration: 245 min 10 sec

• Commit: 8fefdf9

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Test	Results
Failed	0
Passed	53650
Skipped	5321
Total	58971

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[elasticmachine]

Pinging @elastic/integrations (Team:Integrations)

[mergify]

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

• backport-v./d./d./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.

[fearful-symmetry]

/test

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b aix-updates upstream/aix-updates
git merge upstream/master
git push upstream aix-updates

[jsoriano]

LGTM, remember to add a changelog entry.

As a side note, maybe we have to document somewhere the features that are not available for AIX, though probably nobody is going to miss Cloud foundry or Kubernetes support in these systems.

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b aix-updates upstream/aix-updates
git merge upstream/master
git push upstream aix-updates

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b aix-updates upstream/aix-updates
git merge upstream/master
git push upstream aix-updates

[mergify]

This pull request is now in conflicts. Could you fix it? 🙏
To fixup this pull request, you can check out it locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

git fetch upstream
git checkout -b aix-updates upstream/aix-updates
git merge upstream/master
git push upstream aix-updates