[Security Solution][Endpoint] Cleanup and improvements to run_endpoint_agent.js CLI tool

[paul-tavares]

Summary

As a follow up to PR #155455 :

• run_endpoint_agent CLI: Removed internal code that handles the creation of a VM and the enrollment of the agent with fleet and replaced it with use of methods now found in endpoint_host_services
• created new service for managing agent download cache on local system
• enhanced run_endpoint_agent to use cached version of agent download, and thus increase the performance of this tool

[elasticmachine]

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

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 7c3c31e

Failed CI Steps

• FTR Configs #46

Test Failures

• [job] [logs] FTR Configs #46 / spaces api without security get can't access not-a-space from within the default space "before all" hook for "should return 404 when referencing the default space implicitly"

Metrics [docs]

Unknown metric groups

ESLint disabled line counts

id	before	after	diff
enterpriseSearch	17	19	+2
securitySolution	397	400	+3
total			+5

Total ESLint disabled count

id	before	after	diff
enterpriseSearch	18	20	+2
securitySolution	477	480	+3
total			+5

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

cc @paul-tavares

[dasansol92]

How this works? Each time we run the script this is gonna take the current Date, so last cleanup will be always now right? Am I missing something?

[paul-tavares]

Yes and no.

This is the default value for the configuration for this tool. If you look at super.ensureExists() you will see that it uses this only if the settings file does not yet exist.

[dasansol92]

Got it, thanks for the explanation!