[8.6] [APM] Add title in apm settings callout (#145857) (#145915)

# Backport

This will backport the following commits from `main` to `8.6`:
- [[APM] Add title in apm settings callout
(#145857)](#145857)

<!--- Backport version: 8.9.7 -->

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

<!--BACKPORT [{"author":{"name":"Katerina
Patticha","email":"aikaterini.patticha@elastic.co"},"sourceCommit":{"committedDate":"2022-11-21T18:40:38Z","message":"[APM]
Add title in apm settings callout (#145857)\n\n## Summary\r\ncloses
https://github.com/elastic/kibana/issues/145849\r\n\r\nBefore\r\n\r\n\r\n![image](https://user-images.githubusercontent.com/3369346/203056193-9e68694e-5492-40eb-9d4f-f44fe8b1fb48.png)\r\n\r\nAfter\r\n\r\n![image](https://user-images.githubusercontent.com/3369346/203059940-b24af7bd-a19b-492f-bdcb-ec06e3dc24b5.png)","sha":"40de9eb5e7c13b0c3596a37ee0c1d105dc6148ab","branchLabelMapping":{"^v8.7.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:APM","release_note:skip","v8.6.0","v8.7.0"],"number":145857,"url":"https://github.com/elastic/kibana/pull/145857","mergeCommit":{"message":"[APM]
Add title in apm settings callout (#145857)\n\n## Summary\r\ncloses
https://github.com/elastic/kibana/issues/145849\r\n\r\nBefore\r\n\r\n\r\n![image](https://user-images.githubusercontent.com/3369346/203056193-9e68694e-5492-40eb-9d4f-f44fe8b1fb48.png)\r\n\r\nAfter\r\n\r\n![image](https://user-images.githubusercontent.com/3369346/203059940-b24af7bd-a19b-492f-bdcb-ec06e3dc24b5.png)","sha":"40de9eb5e7c13b0c3596a37ee0c1d105dc6148ab"}},"sourceBranch":"main","suggestedTargetBranches":["8.6"],"targetPullRequestStates":[{"branch":"8.6","label":"v8.6.0","labelRegex":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"main","label":"v8.7.0","labelRegex":"^v8.7.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/145857","number":145857,"mergeCommit":{"message":"[APM]
Add title in apm settings callout (#145857)\n\n## Summary\r\ncloses
https://github.com/elastic/kibana/issues/145849\r\n\r\nBefore\r\n\r\n\r\n![image](https://user-images.githubusercontent.com/3369346/203056193-9e68694e-5492-40eb-9d4f-f44fe8b1fb48.png)\r\n\r\nAfter\r\n\r\n![image](https://user-images.githubusercontent.com/3369346/203059940-b24af7bd-a19b-492f-bdcb-ec06e3dc24b5.png)","sha":"40de9eb5e7c13b0c3596a37ee0c1d105dc6148ab"}}]}]
BACKPORT-->

Co-authored-by: Katerina Patticha <aikaterini.patticha@elastic.co>

x-pack/plugins/apm/public/components/app/settings/general_settings/index.tsx

@@ -70,7 +70,12 @@ export function GeneralSettings() {
   return (
     <>
       <EuiCallOut
-        title={
+        title={i18n.translate('xpack.apm.apmSettings.callOutTitle', {
+          defaultMessage: 'Looking for all settings?',
+        })}
+        iconType="search"
+      >
+        <p>
           <FormattedMessage
             id="xpack.apm.apmSettings.kibanaLink"
             defaultMessage="The full list of APM options can be found in {link}"
@@ -82,15 +87,14 @@ export function GeneralSettings() {
                   })}
                 >
                   {i18n.translate('xpack.apm.apmSettings.kibanaLink.label', {
-                    defaultMessage: 'Kibana advanced settings',
+                    defaultMessage: 'Kibana advanced settings.',
                   })}
                 </EuiLink>
               ),
             }}
           />
-        }
-        iconType="iInCircle"
-      />
+        </p>
+      </EuiCallOut>
       <EuiSpacer />
       {apmSettingsKeys.map((settingKey) => {
         const editableConfig = settingsEditableConfig[settingKey];