Alerting: Improve k8s error type (#98569)

* Add more checks to isApiMachineryError type guard

* Make the k8s error details property optional

public/app/features/alerting/unified/utils/k8s/errors.ts

@@ -23,7 +23,7 @@ export type ApiMachineryError = {
   kind: 'Status';
   apiVersion: string;
   code: number;
-  details: {
+  details?: {
     uid: string;
     name?: string;
     group?: string;
@@ -40,7 +40,3 @@ export type ApiMachineryError = {
 export function isApiMachineryError(error: unknown): error is FetchError<ApiMachineryError> {
   return isFetchError(error) && get(error.data, 'kind') === 'Status' && get(error.data, 'status') === 'Failure';
 }
-
-export function matchesApiMachineryError(error: unknown, uid: string) {
-  return isApiMachineryError(error) && error.data.details.uid === uid;
-}

public/app/features/alerting/unified/utils/misc.ts

@@ -260,7 +260,10 @@ export function isErrorLike(error: unknown): error is Error {
 }
 
 export function getErrorCode(error: Error): unknown {
-  return isApiMachineryError(error) ? error.data.details.uid : error.cause;
+  if (isApiMachineryError(error) && error.data.details) {
+    return error.data.details.uid;
+  }
+  return error.cause;
 }
 
 /* this function will check if the error passed as the first argument contains an error code */
@@ -275,7 +278,7 @@ export function isErrorMatchingCode(error: Error | undefined, code: SupportedErr
 export function stringifyErrorLike(error: unknown): string {
   const fetchError = isFetchError(error);
   if (fetchError) {
-    if (isApiMachineryError(error)) {
+    if (isApiMachineryError(error) && error.data.details) {
       const message = getErrorMessageFromCode(error.data.details.uid);
       if (message) {
         return message;