Fix zsh autocompletion failing tests

[belimawr]

Proposed commit message

It looks like the output of the autocompletion script for zsh has
changed, hence the tests are failing. This commit fixes it.

The autocompletion is generated by an external
package (github.com/spf13/cobra), so this commit just updates the test
with the current output.

Checklist

• My code follows the style guidelines of this project
  - [ ] 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.next.asciidoc or CHANGELOG-developer.next.asciidoc.

## Author's Checklist
## How to test this PR locally

Related issues

• Fixes Build 96 for 8.9 with status FAILURE #36550
• Fixes Build 94 for 8.9 with status FAILURE #36511
• Fixes Build 93 for 8.9 with status FAILURE #36509
• Fixes Build 92 for 8.9 with status FAILURE #36508

## Use cases
## Screenshots
## Logs

[elasticmachine]

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Build stats

• Start Time: 2023-09-11T10:49:59.499+0000

• Duration: 79 min 59 sec

Test stats 🧪

Test	Results
Failed	0
Passed	27511
Skipped	2024
Total	29535

💚 Flaky test report

Tests succeeded.

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