[8.19](backport #4544) Add BUILDKITE_ANALYTICS_TOKEN in fips-e2e-test step

[mergify]

What is the problem this PR solves?

Set BUILDKITE_ANALYTICS_TOKEN for FIPS E2E test step. Without this env var FIPS E2E step will break on CI
// Please do not just reference an issue. Explain WHAT the problem this PR solves here.

How does this PR solve the problem?

Include FIPS E2E test step to the list of steps for which BUILDKITE_ANALYTICS_TOKEN will be set in pre-command hook.
// Explain HOW you solved the problem in your code. It is possible that during PR reviews this changes and then this section should be updated.

How to test this PR locally

Design Checklist

• [ ] I have ensured my design is stateless and will work when multiple fleet-server instances are behind a load balancer.
• [ ] I have or intend to scale test my changes, ensuring it will work reliably with 100K+ agents connected.
• [ ] I have included fail safe mechanisms to limit the load on fleet-server: rate limiting, circuit breakers, caching, load shedding, etc.

Checklist

• [ ] 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/fragments using the changelog tool

Related issues

---

This is an automatic backport of pull request #4544 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 2c04d3d has failed:

On branch mergify/bp/8.19/pr-4544
Your branch is up to date with 'origin/8.19'.

You are currently cherry-picking commit 2c04d3d.
  (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)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   .buildkite/hooks/pre-command

no changes added to commit (use "git add" and/or "git commit -a")

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

[prodsecmachine]

🎉 Snyk checks have passed. No issues have been found so far.

✅ security/snyk check is complete. No issues have been found. (View Details)

✅ license/snyk check is complete. No issues have been found. (View Details)

[v1v]

let's backport this - so we can avoid issues in the future with the merge conflicts 🙇

[elastic-sonarqube]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube