[9.2] [Automatic Migrations] Deselect current selection after index pattern updated (#239245) (#239251)

# Backport

This will backport the following commits from `main` to `9.2`:
- [[Automatic Migrations] Deselect current selection after index pattern
updated (#239245)](#239245)

<!--- Backport version: 9.6.6 -->

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

<!--BACKPORT [{"author":{"name":"Kevin
Qualters","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-10-16T01:36:22Z","message":"[Automatic
Migrations] Deselect current selection after index pattern updated
(#239245)\n\n## Summary\n\nIssue:
[#239062](https://github.com/elastic/kibana/issues/239062)\n\nWhen a
user selects some rule migrations on the page and updates the\nindex
pattern placeholder to an actual index pattern, previously
the\nselection would remain. This fixes that problem by setting the
selection\nto an empty array on successfully applying the new
pattern.\n\n\n\nhttps://github.com/user-attachments/assets/21816e68-a80e-4730-8d09-957f0a705cfe\n\n\n\n###
Checklist\n\n- [x] [Unit or
functional\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\nwere
updated or added to match the most common
scenarios","sha":"12007d55f352d953dbd08a0dfe56321842adf7c8","branchLabelMapping":{"^v9.3.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:fix","Team:Threat
Hunting:Investigations","backport:version","v9.2.0","v9.3.0"],"title":"[Automatic
Migrations] Deselect current selection after index pattern
updated","number":239245,"url":"https://github.com/elastic/kibana/pull/239245","mergeCommit":{"message":"[Automatic
Migrations] Deselect current selection after index pattern updated
(#239245)\n\n## Summary\n\nIssue:
[#239062](https://github.com/elastic/kibana/issues/239062)\n\nWhen a
user selects some rule migrations on the page and updates the\nindex
pattern placeholder to an actual index pattern, previously
the\nselection would remain. This fixes that problem by setting the
selection\nto an empty array on successfully applying the new
pattern.\n\n\n\nhttps://github.com/user-attachments/assets/21816e68-a80e-4730-8d09-957f0a705cfe\n\n\n\n###
Checklist\n\n- [x] [Unit or
functional\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\nwere
updated or added to match the most common
scenarios","sha":"12007d55f352d953dbd08a0dfe56321842adf7c8"}},"sourceBranch":"main","suggestedTargetBranches":["9.2"],"targetPullRequestStates":[{"branch":"9.2","label":"v9.2.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"main","label":"v9.3.0","branchLabelMappingKey":"^v9.3.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/239245","number":239245,"mergeCommit":{"message":"[Automatic
Migrations] Deselect current selection after index pattern updated
(#239245)\n\n## Summary\n\nIssue:
[#239062](https://github.com/elastic/kibana/issues/239062)\n\nWhen a
user selects some rule migrations on the page and updates the\nindex
pattern placeholder to an actual index pattern, previously
the\nselection would remain. This fixes that problem by setting the
selection\nto an empty array on successfully applying the new
pattern.\n\n\n\nhttps://github.com/user-attachments/assets/21816e68-a80e-4730-8d09-957f0a705cfe\n\n\n\n###
Checklist\n\n- [x] [Unit or
functional\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\nwere
updated or added to match the most common
scenarios","sha":"12007d55f352d953dbd08a0dfe56321842adf7c8"}}]}]
BACKPORT-->

Co-authored-by: Kevin Qualters <[email protected]>

Author: kibanamachine

x-pack/solutions/security/plugins/security_solution/public/siem_migrations/rules/components/rules_table/index.tsx

@@ -219,6 +219,7 @@ export const MigrationRulesTable: React.FC<MigrationRulesTableProps> = React.mem
           ids: selectedMigrationRules.map((rule) => rule.id),
         });
         setTableLoading(false);
+        setSelectedMigrationRules([]);
       },
       [migrationId, updateIndexPattern, selectedMigrationRules, setTableLoading]
     );