feat(e2e): add libnss3-tools to Dockerfile dependencies

[albarbaro]

Description

Makes certutil available in CI runner image. Needed to manage certificate store for Chromium based browser in Playwright. It's required by FIPS tests.

Which issue(s) does this PR fix

• Fixes #?

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary (requirement for new features)
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.04%. Comparing base (643ece6) to head (0339a01).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5432       +/-   ##
===========================================
- Coverage   74.21%   64.04%   -10.17%     
===========================================
  Files          69       57       -12     
  Lines         799      573      -226     
  Branches      125       99       -26     
===========================================
- Hits          593      367      -226     
  Misses        205      205               
  Partials        1        1               

Flag	Coverage Δ
rhdh	64.04% <ø> (-10.17%)	⬇️

Components	Coverage Δ
Backend plugins	∅ <ø> (∅)
Backend app	71.91% <ø> (ø)
Frontend app	60.50% <ø> (ø)
Plugin utils	∅ <ø> (∅)

---

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[github-actions]

Image was built and published successfully. It is available at:

• quay.io/rhdh-community/rhdh:pr-5432
• quay.io/rhdh-community/rhdh:pr-5432-0339a01c

[subhashkhileri]

/lgtm