Fixes names of legacy index template endpoints (#4372) (#4394)

* Fixes names of legacy index template endpoints.

* Adds deprecation tag.

(cherry picked from commit 14f4ec9)

Co-authored-by: István Zoltán Szabó <[email protected]>

Author: github-actions[bot]

specification/indices/delete_template/IndicesDeleteTemplateRequest.ts

@@ -23,10 +23,12 @@ import { Duration } from '@_types/Time'
 
 /**
  * Delete a legacy index template.
+ * IMPORTANT: This documentation is about legacy index templates, which are deprecated and will be replaced by the composable templates introduced in Elasticsearch 7.8.
  * @rest_spec_name indices.delete_template
  * @availability stack stability=stable
  * @cluster_privileges manage_index_templates
  * @doc_id indices-delete-template-v1
+ * @deprecated 7.8.0
  */
 export interface Request extends RequestBase {
   path_parts: {

specification/indices/get_template/IndicesGetTemplateRequest.ts

@@ -22,7 +22,7 @@ import { Names } from '@_types/common'
 import { Duration } from '@_types/Time'
 
 /**
- * Get index templates.
+ * Get legacy index templates.
  * Get information about one or more index templates.
  *
  * IMPORTANT: This documentation is about legacy index templates, which are deprecated and will be replaced by the composable templates introduced in Elasticsearch 7.8.
@@ -31,6 +31,7 @@ import { Duration } from '@_types/Time'
  * @doc_id indices-get-template-v1
  * @ext_doc_id index-templates
  * @cluster_privileges manage_index_templates
+ * @deprecated 7.8.0
  */
 export interface Request extends RequestBase {
   path_parts: {

specification/indices/put_template/IndicesPutTemplateRequest.ts

@@ -27,7 +27,7 @@ import { integer } from '@_types/Numeric'
 import { Duration } from '@_types/Time'
 
 /**
- * Create or update an index template.
+ * Create or update a legacy index template.
  * Index templates define settings, mappings, and aliases that can be applied automatically to new indices.
  * Elasticsearch applies templates to new indices based on an index pattern that matches the index name.
  *
@@ -54,6 +54,7 @@ import { Duration } from '@_types/Time'
  * @cluster_privileges manage_index_templates, manage
  * @doc_id index-templates-v1
  * @ext_doc_id index-templates
+ * @deprecated 7.8.0
  */
 export interface Request extends RequestBase {
   path_parts: {