[7.x] [Fleet] Add global component template to all fleet index templates (#102225)

[nchaulet]

Backports the following commits to 7.x:

• [Fleet] Add global component template to all fleet index templates ([Fleet] Add global component template to all fleet index templates #102225)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 61b3b95
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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	1016	1017	+1

Unknown metric groups

API count

id	before	after	diff
fleet	1108	1109	+1

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@elasticmachine merge upstream