test(e2e): escape shell special characters in token generation

[lukidzi]

Motivation

This PR fixes a command injection vulnerability in the test framework's token generation methods. User-provided data (mesh names, service names, workload names, zone names, and scope values) was being embedded in shell command strings without proper escaping of single quotes.

Implementation information

Fixed four methods in test/framework/universal_controlplane.go:

• GenerateDpToken: Escapes single quotes in mesh, service, and workload names
• GenerateZoneIngressToken: Escapes single quotes in zone names
• GenerateZoneEgressToken: Escapes single quotes in zone names
• GenerateZoneToken: Escapes single quotes in zone names and scope arrays

[github-actions]

Reviewer Checklist

🔍 Each of these sections need to be checked by the reviewer of the PR 🔍:
If something doesn't apply please check the box and add a justification if the reason is non obvious.

• Is the PR title satisfactory? Is this part of a larger feature and should be grouped using > Changelog?
• PR description is clear and complete. It Links to relevant issue as well as docs and UI issues
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as an image registry)
• IPv6 is taken into account (.e.g: no string concatenation of host port)
• Tests (Unit test, E2E tests, manual test on universal and k8s)
  • Don't forget ci/ labels to run additional/fewer tests
• Does this contain a change that needs to be notified to users? In this case, UPGRADE.md should be updated.
• Does it need to be backported according to the backporting policy? (this GH action will add "backport" label based on these file globs, if you want to prevent it from adding the "backport" label use no-backport-autolabel label)