[8.14] [Search] Fix index name not cleaning in between different indi…

…ces (#181837) (#181967)

# Backport

This will backport the following commits from `main` to `8.14`:
- [[Search] Fix index name not cleaning in between different indices
(#181837)](#181837)

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

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

<!--BACKPORT [{"author":{"name":"Efe Gürkan
YALAMAN","email":"efeguerkan.yalaman@elastic.co"},"sourceCommit":{"committedDate":"2024-04-29T11:29:23Z","message":"[Search]
Fix index name not cleaning in between different indices (#181837)\n\n##
Summary\r\n\r\n\r\n\r\nhttps://github.com/elastic/kibana/assets/1410658/76067c45-7f69-4b3e-939c-d6746a2963a6\r\n\r\n\r\n\r\n\r\n###
Checklist\r\n\r\nDelete any items that are not applicable to this
PR.\r\n\r\n- [ ] [Unit or
functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere
updated or added to match the most common scenarios\r\n- [x] Any UI
touched in this PR is usable by keyboard only (learn more\r\nabout
[keyboard accessibility](https://webaim.org/techniques/keyboard/))\r\n-
[x] This renders correctly on smaller devices using a
responsive\r\nlayout. (You can test this [in
your\r\nbrowser](https://www.browserstack.com/guide/responsive-testing-on-local-server))\r\n-
[x] This was checked for
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Fix index name not cleaning in between different
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Fix index name not cleaning in between different indices (#181837)\n\n##
Summary\r\n\r\n\r\n\r\nhttps://github.com/elastic/kibana/assets/1410658/76067c45-7f69-4b3e-939c-d6746a2963a6\r\n\r\n\r\n\r\n\r\n###
Checklist\r\n\r\nDelete any items that are not applicable to this
PR.\r\n\r\n- [ ] [Unit or
functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere
updated or added to match the most common scenarios\r\n- [x] Any UI
touched in this PR is usable by keyboard only (learn more\r\nabout
[keyboard accessibility](https://webaim.org/techniques/keyboard/))\r\n-
[x] This renders correctly on smaller devices using a
responsive\r\nlayout. (You can test this [in
your\r\nbrowser](https://www.browserstack.com/guide/responsive-testing-on-local-server))\r\n-
[x] This was checked for
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Fix index name not cleaning in between different indices (#181837)\n\n##
Summary\r\n\r\n\r\n\r\nhttps://github.com/elastic/kibana/assets/1410658/76067c45-7f69-4b3e-939c-d6746a2963a6\r\n\r\n\r\n\r\n\r\n###
Checklist\r\n\r\nDelete any items that are not applicable to this
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functional\r\ntests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)\r\nwere
updated or added to match the most common scenarios\r\n- [x] Any UI
touched in this PR is usable by keyboard only (learn more\r\nabout
[keyboard accessibility](https://webaim.org/techniques/keyboard/))\r\n-
[x] This renders correctly on smaller devices using a
responsive\r\nlayout. (You can test this [in
your\r\nbrowser](https://www.browserstack.com/guide/responsive-testing-on-local-server))\r\n-
[x] This was checked for
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BACKPORT-->

Co-authored-by: Efe Gürkan YALAMAN <efeguerkan.yalaman@elastic.co>

x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/search_indices/delete_index_modal.tsx

@@ -5,7 +5,7 @@
  * 2.0.
  */
 
-import React, { useState } from 'react';
+import React, { useEffect, useState } from 'react';
 
 import { useActions, useValues } from 'kea';
 
@@ -39,6 +39,9 @@ export const DeleteIndexModal: React.FC = () => {
   } = useValues(IndicesLogic);
 
   const [inputIndexName, setInputIndexName] = useState('');
+  useEffect(() => {
+    setInputIndexName('');
+  }, [isDeleteModalVisible, indexName]);
 
   return isDeleteModalVisible ? (
     <EuiConfirmModal
@@ -138,6 +141,8 @@ export const DeleteIndexModal: React.FC = () => {
           )}
         >
           <EuiFieldText
+            data-test-subj="entSearchContent-indices-deleteModal-input"
+            data-telemetry-id="entSearchContent-indices-deleteModal-input"
             onChange={(e) => setInputIndexName(e.target.value)}
             value={inputIndexName}
           />