[125499] Add missing fields in monitoring logstash mb template mapping

[ijardillier]

This commit adds some missing fields in monitoring template (logstash).

Closes #125499

[elasticsearchmachine]

Pinging @elastic/es-data-management (Team:Data Management)

[pickypg]

Hi @ijardillier, can you please sign the CLA? Once done, I can add the changelog and we can look at merging this.

[ijardillier]

Hi @pickypg, I've just signed it.

[pickypg]

I just noticed that this branch is in your forked repository. Can you:

1. Pull down upstream changes to this PR (two merges against the main branch that are probably not in your local branch)
2. Add a file named docs/changelog/127053.yaml
3. Push new file

pr: 127053
summary: Add missing fields to the Logstash Stack Monitoring Template
area: Stack Monitoring
type: enhancement
issues:
 - 125499

[dakrone]

Don't forget to increment MonitoringTemplateRegistry.STACK_MONITORING_REGISTRY_VERSION so that this new version will be installed on upgrade.

[mashhurs]

@ijardillier I have pulled your change, validated and suggested more fields with ijardillier#1 PR.
The PR also adds changelog and bumps the template version. If you merge my suggestion, I will do overall review, so far going to a right direction.

FYI: @pickypg, it seems we don't have Stack Monitoring area but we have just Monitoring. Let me know if it needs to be changed.

CC: @dakrone

Thank you all!

[pickypg]

seems we don't have Stack Monitoring area but we have just Monitoring. Let me know if it needs to be changed.

Monitoring works.

[mashhurs]

@elasticmachine test this

[pickypg]

LGTM