[8.x] [Inventory] Promote new inventory plugin in APM (#193997)

[kibanamachine]

Backport

This will backport the following commits from main to 8.x:

• [Inventory] Promote new inventory plugin in APM (#193997)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

Pinging @elastic/obs-ux-infra_services-team (Team:obs-ux-infra_services)

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: cfbafff

Failed CI Steps

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
apm	1871	1852	-19
observabilityShared	209	210	+1
total			-18

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
observabilityShared	473	478	+5

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
apm	3.5MB	3.5MB	-28.2KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
apm	40.4KB	40.2KB	-254.0B
observabilityShared	71.1KB	71.6KB	+489.0B
total			+235.0B

Unknown metric groups

API count

id	before	after	diff
observabilityShared	478	483	+5

miscellaneous assets size

id	before	after	diff
apm	1.3MB	1.3MB	-68.4KB

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

cc @iblancof