[8.x] fix(slo): use correct uisettings (#193362)

[kibanamachine]

Backport

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

• fix(slo): use correct uisettings (#193362)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

Pinging @elastic/obs-ux-management-team (Team:obs-ux-management)

[kibana-ci]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 1af6b3d

Failed CI Steps

• Jest Tests #16
• FTR Configs #2

Test Failures

• [job] [logs] FTR Configs #2 / Reporting APIs Network Policy "after all" hook for "should fail job when page violates the network policy"
• [job] [logs] FTR Configs #2 / Reporting APIs Network Policy should fail job when page violates the network policy
• [job] [logs] Jest Tests #16 / Severity form field selects the correct value when changed assigned to me
• [job] [logs] Jest Tests #16 / Title it renders

Metrics [docs]

Async chunks

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

id	before	after	diff
slo	852.9KB	853.7KB	+828.0B

Page load bundle

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

id	before	after	diff
slo	24.6KB	24.7KB	+134.0B

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

cc @kdelemme