[8.x](backport #42202) Update elastic-agent-libs to v0.18.0

[mergify]

Proposed commit message

Update elastic-agent-libs to v.0.18.0

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Disruptive User Impact

elastic-agent-libs v0.18.0 updates the min accepted TLS version to 1.1, and sets the default min to 1.2.

Related Issues

• Closes Remove TLS 1.x from default list of supported protocols #41595

  ---

  This is an automatic backport of pull request Update elastic-agent-libs to v0.18.0 #42202 done by Mergify.

[mergify]

Cherry-pick of ef29005 has failed:

On branch mergify/bp/8.x/pr-42202
Your branch is up to date with 'origin/8.x'.

You are currently cherry-picking commit ef2900565.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   NOTICE.txt

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   go.mod
	both modified:   go.sum

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[botelastic]

This pull request doesn't have a Team:<team> label.

[mergify]

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

[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 mergify/bp/8.x/pr-42202 upstream/mergify/bp/8.x/pr-42202
git merge upstream/8.x
git push upstream mergify/bp/8.x/pr-42202

[michel-laterman]

The TLS tests I added are failing. I think the issue here is that we added the SetInsecureDefaults call in GenRootCmdWithSettings; which is not actually called by NewBeat. @kruskall, do you think that we should add a call to SetInsecureDefaults within the tests themselves, or should test it some other way?

[kruskall]

mmh, I think ideally we should have test coverage for GenRootCmdWithSettings but calling SetInsecureDefaults could be a good workaround to ensure the logic works as intended