[8.x] [ML] Anomaly Detection: Migrate chart tooltip from SCSS to emotion (#199417)

[kibanamachine]

Backport

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

• [ML] Anomaly Detection: Migrate chart tooltip from SCSS to emotion (#199417)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: a161432

Failed CI Steps

• FTR Configs #57

Test Failures

• [job] [logs] FTR Configs #57 / Rules Management - Prebuilt Rules - Prebuilt Rules Management @ess @serverless @skipInServerlessMKI Bootstrap Prebuilt Rules should skip installing fleet packages if they are already installed

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
ml	2013	2143	+130

Async chunks

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

id	before	after	diff
ml	4.5MB	4.7MB	+178.2KB

Page load bundle

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

id	before	after	diff
ml	75.4KB	75.4KB	+49.0B

cc @walterra