fix cancellation exception gets swallowed (#4607)

Author: Will-ShaoHua

plugins/core/jetbrains-community/src/software/aws/toolkits/jetbrains/core/credentials/ToolkitAuthManager.kt

@@ -272,6 +272,8 @@ private fun reauthProviderIfNeeded(
                     credentialSourceId = CredentialSourceId.AwsId,
                     reason = e.message
                 )
+
+                throw e
             }
         }
     }