[8.18](backport #45129) Bump up github.com/go-viper/mapstructure/v2 dependency

[mergify]

What does this PR do?

This PR bumps up the github.com/go-viper/mapstructure/v2 module dependency to the latest available version.

Why is it important?

To keep our dependencies up to date.

---

This is an automatic backport of pull request #45129 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 113b5a5 has failed:

On branch mergify/bp/8.18/pr-45129
Your branch is up to date with 'origin/8.18'.

You are currently cherry-picking commit 113b5a572.
  (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

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)