[8.x] [ML] AIOps: Use package instead of context for using field stats flyout (#194517)

[kibanamachine]

Backport

This will backport the following commits from main to 8.x:

• [ML] AIOps: Use package instead of context for using field stats flyout (#194517)

Questions ?

Please refer to the Backport tool documentation

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 55a1b33

Failed CI Steps

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
aiops	582	611	+29

Async chunks

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

id	before	after	diff
aiops	548.5KB	551.9KB	+3.5KB
ml	4.6MB	4.6MB	-6.9KB
total			-3.4KB

Page load bundle

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

id	before	after	diff
aiops	7.9KB	8.1KB	+175.0B

Unknown metric groups

API count

id	before	after	diff
aiops	74	73	-1

async chunk count

id	before	after	diff
aiops	30	32	+2

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

cc @walterra