[Security Solution] remove metadata transform health task

[joeypoon]

Summary

Remove endpoint metadata transform health task. This is no longer needed as the transforms are now set to be unattended: elastic/endpoint-package#353.

• Relates: https://github.com/elastic/security-team/issues/6165

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 662835d

Metrics [docs]

Unknown metric groups

ESLint disabled line counts

id	before	after	diff
securitySolution	432	434	+2

Total ESLint disabled count

id	before	after	diff
securitySolution	512	514	+2

History

• 💔 Build #115201 failed f45a503
• 💔 Build #114852 failed 71f8fa662f831979d8503479b8f4868b6f0f7b6b
• 💛 Build #114503 was flaky f43e8e7a10e34136299fc29268b80188ca8ce449

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[elasticmachine]

Pinging @elastic/security-defend-workflows (Team:Defend Workflows)

[mikecote]

ResponseOps changes LGTM

[ashokaditya]

🚀

[joeypoon]

closing this for now as there are some issues preventing us from switching to unattended transforms: elastic/endpoint-package#359

[droberts195]

Are you sure you want to remove these checks now the transform is unattended? As far as I can see these checks did more than what an unattended transform will do. These checks appear to reinstall the transforms if somebody deletes them. An unattended transform can still be deleted. If you want to keep that automatic reinstall functionality it may be simplest just to keep all this functionality.