Mark ITv2 APIs as experimental (#55874)

This commit marks the V2 index and component template APIs experimental, with intent to mark them as
"stable" in 7.9.0.

Relates to #53101

rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_component_template.json

@@ -4,7 +4,7 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-component-templates.html",
       "description":"Deletes a component template"
     },
-    "stability":"stable",
+    "stability":"experimental",
     "url":{
       "paths":[
         {

rest-api-spec/src/main/resources/rest-api-spec/api/cluster.exists_component_template.json

@@ -4,7 +4,7 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-component-templates.html",
       "description":"Returns information about whether a particular component template exist"
     },
-    "stability":"stable",
+    "stability":"experimental",
     "url":{
       "paths":[
         {

rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_component_template.json

@@ -4,7 +4,7 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-component-templates.html",
       "description":"Returns one or more component templates"
     },
-    "stability":"stable",
+    "stability":"experimental",
     "url":{
       "paths":[
         {

rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_component_template.json

@@ -4,7 +4,7 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-component-templates.html",
       "description":"Creates or updates a component template"
     },
-    "stability":"stable",
+    "stability":"experimental",
     "url":{
       "paths":[
         {

rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_index_template.json

@@ -4,7 +4,7 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html",
       "description":"Deletes an index template."
     },
-    "stability":"stable",
+    "stability":"experimental",
     "url":{
       "paths":[
         {

rest-api-spec/src/main/resources/rest-api-spec/api/indices.exists_index_template.json

@@ -4,7 +4,7 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html",
       "description":"Returns information about whether a particular index template exists."
     },
-    "stability":"stable",
+    "stability":"experimental",
     "url":{
       "paths":[
         {

rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_index_template.json

@@ -4,7 +4,7 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html",
       "description":"Returns an index template."
     },
-    "stability":"stable",
+    "stability":"experimental",
     "url":{
       "paths":[
         {

rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_index_template.json

@@ -4,7 +4,7 @@
       "url":"https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-templates.html",
       "description":"Creates or updates an index template."
     },
-    "stability":"stable",
+    "stability":"experimental",
     "url":{
       "paths":[
         {