[7.x] Don't make the caller do work the function can do (#83180)

[jfsiii]

Backports the following commits to 7.x:

• Don't make the caller do work the function can do ([Ingest Manager] Simplify createInstallation interface #83180)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 45fbb57

Metrics [docs]

Saved Objects .kibana field count

Every field in each saved object type adds overhead to Elasticsearch. Kibana needs to keep the total field count below Elasticsearch's default limit of 1000 fields. Only specify field mappings for the fields you wish to search on or query. See https://www.elastic.co/guide/en/kibana/master/development-plugin-saved-objects.html#_mappings

id	before	after	diff
fleet-agents	25	23	-2
ingest-outputs	11	10	-1
ingest-package-policies	35	30	-5
lens	7	6	-1
total			-9

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