[8.x] [Obs AI Assistant] Avoid showing error toast when action is abo…

…rted b… (#195331) (#195396)

# Backport

This will backport the following commits from `main` to `8.x`:
- [[Obs AI Assistant] Avoid showing error toast when action is aborted
b… (#195331)](#195331)

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

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

<!--BACKPORT [{"author":{"name":"Viduni
Wickramarachchi","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-10-08T12:20:38Z","message":"[Obs
AI Assistant] Avoid showing error toast when action is aborted b…
(#195331)\n\nCloses
https://github.com/elastic/kibana/issues/186794\r\n\r\n##
Summary\r\n\r\n### Problem\r\nWhen the user clicks on \"Stop
generating\" while the AI Assistant is\r\ngenerating an answer, an error
toast is shown with the error message\r\n\"Aborted\". This is
unnecessary as the user knows they aborted their\r\naction.\r\n\r\n###
Solution\r\nDo not show an error toast if the action is aborted by the
user.","sha":"43a3d4a68ada67a584686b223ea8d798f4018cde","branchLabelMapping":{"^v9.0.0$":"main","^v8.16.0$":"8.x","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:fix","v9.0.0","backport:prev-minor","Team:Obs
AI Assistant","ci:project-deploy-observability"],"title":"[Obs AI
Assistant] Avoid showing error toast when action is aborted
b…","number":195331,"url":"https://github.com/elastic/kibana/pull/195331","mergeCommit":{"message":"[Obs
AI Assistant] Avoid showing error toast when action is aborted b…
(#195331)\n\nCloses
https://github.com/elastic/kibana/issues/186794\r\n\r\n##
Summary\r\n\r\n### Problem\r\nWhen the user clicks on \"Stop
generating\" while the AI Assistant is\r\ngenerating an answer, an error
toast is shown with the error message\r\n\"Aborted\". This is
unnecessary as the user knows they aborted their\r\naction.\r\n\r\n###
Solution\r\nDo not show an error toast if the action is aborted by the
user.","sha":"43a3d4a68ada67a584686b223ea8d798f4018cde"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v9.0.0","branchLabelMappingKey":"^v9.0.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/195331","number":195331,"mergeCommit":{"message":"[Obs
AI Assistant] Avoid showing error toast when action is aborted b…
(#195331)\n\nCloses
https://github.com/elastic/kibana/issues/186794\r\n\r\n##
Summary\r\n\r\n### Problem\r\nWhen the user clicks on \"Stop
generating\" while the AI Assistant is\r\ngenerating an answer, an error
toast is shown with the error message\r\n\"Aborted\". This is
unnecessary as the user knows they aborted their\r\naction.\r\n\r\n###
Solution\r\nDo not show an error toast if the action is aborted by the
user.","sha":"43a3d4a68ada67a584686b223ea8d798f4018cde"}}]}] BACKPORT-->

Co-authored-by: Viduni Wickramarachchi <[email protected]>

x-pack/plugins/observability_solution/observability_ai_assistant/public/hooks/use_chat.ts

@@ -104,10 +104,11 @@ function useChatWithoutContext({
     (error: Error) => {
       if (error instanceof AbortError) {
         setChatState(ChatState.Aborted);
-      } else {
-        setChatState(ChatState.Error);
+        return;
       }
 
+      setChatState(ChatState.Error);
+
       if (isTokenLimitReachedError(error)) {
         setMessages((msgs) => [
           ...msgs,