fix: mage installation with go1.18 (backport #33083)

[mergify]

This is an automatic backport of pull request #33083 done by Mergify.
Cherry-pick of 5385fd2 has failed:

On branch mergify/bp/8.5/pr-33083
Your branch is up to date with 'origin/8.5'.

You are currently cherry-picking commit 5385fd2387.
  (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:   Makefile
	modified:   dev-tools/make/mage-install.mk

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

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

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[botelastic]

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

[botelastic]

Hi!
We just realized that we haven't looked into this PR in a while. We're sorry!

We're labeling this issue as Stale to make it hit our filters and make sure we get back to it as soon as possible. In the meantime, it'd be extremely helpful if you could take a look at it as well and confirm its relevance. A simple comment with a nice emoji will be enough :+1.
Thank you for your contribution!

[botelastic]

Hi!
This PR has been stale for a while and we're going to close it as part of our cleanup procedure.
We appreciate your contribution and would like to apologize if we have not been able to review it, due to the current heavy load of the team.
Feel free to re-open this PR if you think it should stay open and is worth rebasing.
Thank you for your contribution!