[Elastic Agent] Composed Verifier does not always remove files

[blakerouse]

Elastic Agent uses the composed.Verifier to chain multiple verifiers together. The issue in this code is that only the last verify is allowed to remove the files when it fails. If the previous verifiers in the chain fail then they do not remove the files.

The code needs to be changed to ensure that at any point that a verifier fails that the files are removed (when enabled), instead of waiting for the last verifier (which might not be reached).

[elasticmachine]

Pinging @elastic/elastic-agent-control-plane (Team:Elastic-Agent-Control-Plane)