Relabel added->upserted, removed->deleted, removed total (#179755)

## Summary
closes https://github.com/elastic/connectors/issues/2315

This changes the displayed labels for a few connector metrics.

"Added" -> "Upserted". This is intended to make more clear that the
count doesn't necessarily mean "new documents" but is a union of new
docs and doc updates.

"Removed" -> "Deleted". This just aligns verbiage between our overview
page and our event log flyout.

"Total" -> "". This number was confusing to users because it wasn't
clear that it was a total _from a specific point in time_ and may not
still have any bearing on current state. It will remain in the backend
for troubleshooting, but has been removed from the event log view.

<img width="458" alt="Screenshot 2024-04-01 at 11 32 44 AM"
src="4c53957b-7bc4-4fa7-8e5e-a57b2f19e7bc">
<img width="639" alt="Screenshot 2024-04-01 at 11 33 03 AM"
src="2da18a63-af45-4953-ae3f-b173abbdfbd7">


### Checklist


- [x] Any text added follows [EUI's writing
guidelines](https://elastic.github.io/eui/#/guidelines/writing), uses
sentence case text and includes [i18n
support](https://github.com/elastic/kibana/blob/main/packages/kbn-i18n/README.md)
- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

packages/kbn-search-connectors/components/sync_jobs/__snapshots__/documents_panel.test.tsx.snap

@@ -9,15 +9,11 @@ exports[`DocumentsPanel renders 1`] = `
       Array [
         Object {
           "field": "added",
-          "name": "Added",
+          "name": "Upserted",
         },
         Object {
           "field": "removed",
-          "name": "Removed",
-        },
-        Object {
-          "field": "total",
-          "name": "Total",
+          "name": "Deleted",
         },
         Object {
           "field": "volume",

packages/kbn-search-connectors/components/sync_jobs/documents_panel.tsx

@@ -17,7 +17,6 @@ import { FlyoutPanel } from './flyout_panel';
 interface SyncJobDocumentsPanelProps {
   added: number;
   removed: number;
-  total: number;
   volume: number;
 }
 
@@ -26,19 +25,13 @@ export const SyncJobDocumentsPanel: React.FC<SyncJobDocumentsPanelProps> = (sync
     {
       field: 'added',
       name: i18n.translate('searchConnectors.index.syncJobs.documents.added', {
-        defaultMessage: 'Added',
+        defaultMessage: 'Upserted',
       }),
     },
     {
       field: 'removed',
       name: i18n.translate('searchConnectors.index.syncJobs.documents.removed', {
-        defaultMessage: 'Removed',
-      }),
-    },
-    {
-      field: 'total',
-      name: i18n.translate('searchConnectors.index.syncJobs.documents.total', {
-        defaultMessage: 'Total',
+        defaultMessage: 'Deleted',
       }),
     },
     {

packages/kbn-search-connectors/components/sync_jobs/sync_job_flyout.tsx

@@ -76,7 +76,6 @@ export const SyncJobFlyout: React.FC<SyncJobFlyoutProps> = ({ onClose, syncJob }
           <EuiFlexItem>
             <SyncJobDocumentsPanel
               added={syncJob.indexed_document_count}
-              total={syncJob.total_document_count ?? 0}
               removed={syncJob.deleted_document_count}
               volume={syncJob.indexed_document_volume ?? 0}
             />

packages/kbn-search-connectors/components/sync_jobs/sync_jobs_table.tsx

@@ -63,7 +63,7 @@ export const SyncJobsTable: React.FC<SyncJobHistoryTableProps> = ({
           {
             field: 'indexed_document_count',
             name: i18n.translate('searchConnectors.searchIndices.addedDocs.columnTitle', {
-              defaultMessage: 'Docs added',
+              defaultMessage: 'Docs upserted',
             }),
             sortable: true,
             truncateText: true,

x-pack/plugins/translations/translations/fr-FR.json

@@ -5581,7 +5581,6 @@
     "searchConnectors.index.syncJobs.documents.added": "Ajouté",
     "searchConnectors.index.syncJobs.documents.removed": "Retiré",
     "searchConnectors.index.syncJobs.documents.title": "Documents",
-    "searchConnectors.index.syncJobs.documents.total": "Total",
     "searchConnectors.index.syncJobs.documents.value": "Valeur",
     "searchConnectors.index.syncJobs.documents.volume": "Volume",
     "searchConnectors.index.syncJobs.documents.volume.lessThanOneMBLabel": "Inférieur à 1 Mo",

x-pack/plugins/translations/translations/ja-JP.json

@@ -5574,7 +5574,6 @@
     "searchConnectors.index.syncJobs.documents.added": "追加",
     "searchConnectors.index.syncJobs.documents.removed": "削除しました",
     "searchConnectors.index.syncJobs.documents.title": "ドキュメント",
-    "searchConnectors.index.syncJobs.documents.total": "合計",
     "searchConnectors.index.syncJobs.documents.value": "値",
     "searchConnectors.index.syncJobs.documents.volume": "量",
     "searchConnectors.index.syncJobs.documents.volume.lessThanOneMBLabel": "1mb未満",

x-pack/plugins/translations/translations/zh-CN.json

@@ -5585,7 +5585,6 @@
     "searchConnectors.index.syncJobs.documents.added": "已添加",
     "searchConnectors.index.syncJobs.documents.removed": "已移除",
     "searchConnectors.index.syncJobs.documents.title": "文档",
-    "searchConnectors.index.syncJobs.documents.total": "合计",
     "searchConnectors.index.syncJobs.documents.value": "值",
     "searchConnectors.index.syncJobs.documents.volume": "卷",
     "searchConnectors.index.syncJobs.documents.volume.lessThanOneMBLabel": "小于 1mb",