[7.x] [Fleet] Remove beats management plugin (#99789)

[afgomez]

Backports the following commits to 7.x:

• [Fleet] Remove beats management plugin ([Fleet] Remove beats management plugin #99789)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 0e988c5
• Storybooks Preview
• Documentation Changes

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
beatsManagement	244	-	-244

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
beatsManagement	2	-	-2

Async chunks

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

id	before	after	diff
beatsManagement	503.9KB	-	-503.9KB

Page load bundle

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

id	before	after	diff
beatsManagement	104.3KB	-	-104.3KB

Unknown metric groups

API count

id	before	after	diff
beatsManagement	2	-	-2

async chunk count

id	before	after	diff
beatsManagement	2	-	-2

References to deprecated APIs

id	before	after	diff
beatsManagement	2	-	-2
canvas	29	25	-4
crossClusterReplication	8	6	-2
fleet	22	20	-2
globalSearch	4	2	-2
indexManagement	12	7	-5
infra	261	149	-112
lens	67	45	-22
licensing	18	15	-3
lists	239	236	-3
maps	286	208	-78
ml	121	115	-6
monitoring	109	56	-53
securitySolution	390	346	-44
stackAlerts	101	95	-6
total			-344

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@elasticmachine merge upstream