[8.16](backport #4405) Upgrade x/crypto and x/net to latest

[mergify]

Upgrade x/crypto and x/net to latest to address some dependabot alerts.

---

This is an automatic backport of pull request #4405 done by Mergify.

[mergify]

Cherry-pick of 25ff1eb has failed:

On branch mergify/bp/8.16/pr-4405
Your branch is up to date with 'origin/8.16'.

You are currently cherry-picking commit 25ff1eb.
  (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
	new file:   changelog/fragments/1738701949-Upgrade-golang.org-x-net-to-v0.34.0-and-golang.org-x-crypto-to-v0.32.0..yaml
	modified:   go.mod
	modified:   go.sum

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

[pierrehilbert]

malformed go.sum:
--
  | /opt/buildkite-agent/builds/bk-agent-prod-gcp-1738750591936715487/elastic/fleet-server/testing/go.sum:201: wrong number of fields 9

cc @jlind23