[8.16](backport #6065) Skip notifyFleetAuditUninstall on Windows

[mergify]

What does this PR do?

Skips calling notifyFleetAuditUninstall on Windows.

When enabled it makes it much more likely that a panic will occur, but this doesn't actually seem like the culprit it just makes it more likely to happen.

NOTE: This doesn't actually fix the issue on Windows, it just makes it less likely to occur. Even with this disabled I am still seeing uninstall failing on like the 68th retry, but with this enabled it more likely happens on the 6-8th try. This is just reducing the likely that this issue occurs, it is not actually fixing the issue. (Just want to make that clear).

Why is it important?

Reduces changes that uninstall happens on Windows.

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/fragments using the changelog tool
• [ ] I have added an integration test or an E2E test

Disruptive User Impact

How to test this PR locally

Related issues

• Relates Agent throws exception when uninstalling on windows #5952

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This is an automatic backport of pull request #6065 done by [Mergify](https://mergify.com).

[elastic-sonarqube]

Quality Gate passed

Issues
1 New issue
0 Fixed 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