[8.x] fix(slo): remove extra field from synthetics indicator params (#…

…199542) (#199853)

# Backport

This will backport the following commits from `main` to `8.x`:
- [fix(slo): remove extra field from synthetics indicator params
(#199542)](#199542)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Kevin
Delemme","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-11-12T18:15:02Z","message":"fix(slo):
remove extra field from synthetics indicator params
(#199542)","sha":"eea4a204e40869a584f485ed52ed350f65cb57c9","branchLabelMapping":{"^v9.0.0$":"main","^v8.17.0$":"8.x","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["bug","release_note:fix","v9.0.0","backport:prev-major","ci:project-deploy-observability","Team:obs-ux-management","v8.17.0"],"title":"fix(slo):
remove extra field from synthetics indicator
params","number":199542,"url":"https://github.com/elastic/kibana/pull/199542","mergeCommit":{"message":"fix(slo):
remove extra field from synthetics indicator params
(#199542)","sha":"eea4a204e40869a584f485ed52ed350f65cb57c9"}},"sourceBranch":"main","suggestedTargetBranches":["8.x"],"targetPullRequestStates":[{"branch":"main","label":"v9.0.0","branchLabelMappingKey":"^v9.0.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/199542","number":199542,"mergeCommit":{"message":"fix(slo):
remove extra field from synthetics indicator params
(#199542)","sha":"eea4a204e40869a584f485ed52ed350f65cb57c9"}},{"branch":"8.x","label":"v8.17.0","branchLabelMappingKey":"^v8.17.0$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Kevin Delemme <[email protected]>

x-pack/plugins/observability_solution/slo/public/pages/slo_edit/components/synthetics_common/field_selector.tsx

@@ -120,7 +120,6 @@ export function FieldSelector({
                   ? (field.value as Array<{ value: string; label: string }>).map((value) => ({
                       value: value.value,
                       label: value.label,
-                      'data-test-subj': `${dataTestSubj}SelectedValue`,
                     }))
                   : []
               }