[7.x] Add APM and Synthetics to auto update package list (#114641)

[kibanamachine]

Backports the following commits to 7.x:

• Add APM and Synthetics to auto update package list ([Fleet] Add APM and Synthetics to auto update package list #114641)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 19d83ed
• Storybooks Preview

Metrics [docs]

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
fleet	1107	1109	+2

Page load bundle

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

id	before	after	diff
fleet	103.4KB	103.6KB	+217.0B

Unknown metric groups

API count

id	before	after	diff
fleet	1207	1209	+2

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

cc @kpollich