[7.x] Introduce capabilities provider and switcher to file upload plugin (#96593)

[kibanamachine]

Backports the following commits to 7.x:

• Introduce capabilities provider and switcher to file upload plugin (Introduce capabilities provider and switcher to file upload plugin #96593)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 421229c
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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
security	31	32	+1

Public APIs missing exports

Total count of every type that is part of your API that should be exported but is not. This will cause broken links in the API documentation system. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats exports for more detailed information.

id	before	after	diff
security	12	15	+3

Unknown metric groups

API count

id	before	after	diff
security	72	73	+1

References to deprecated APIs

id	before	after	diff
fleet	4	2	-2
globalSearch	4	2	-2
infra	5	3	-2
total			-6

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

cc @legrego