flipping post and get and adding real deprecated version in specs

Signed-off-by: Tokesh <[email protected]>

spec/namespaces/indices.yaml

@@ -844,7 +844,7 @@ paths:
       operationId: indices.get_upgrade.0
       x-operation-group: indices.get_upgrade
       x-version-added: '1.0'
-      x-version-deprecated: '2.0' # i dont know the actual version
+      x-version-deprecated: '1.0'
       description: The `_upgrade` API is no longer useful and will be removed.
       externalDocs:
         url: https://opensearch.org/docs/latest
@@ -859,7 +859,7 @@ paths:
       operationId: indices.upgrade.0
       x-operation-group: indices.upgrade
       x-version-added: '1.0'
-      x-version-deprecated: '2.0' # i dont know the actual version
+      x-version-deprecated: '1.0'
       description: The `_upgrade` API is no longer useful and will be removed.
       externalDocs:
         url: https://opensearch.org/docs/latest

tests/default/indices/upgrade.yaml

@@ -18,14 +18,6 @@ prologues:
         - {create: {_index: movies, _id: movie2}}
         - {director: Nicolas Winding Refn, title: Drive, year: 1960}
 chapters:
-  - synopsis: Check index upgrade status (GET).
-    path: /{index}/_upgrade
-    method: GET
-    parameters:
-      index: [movies]
-    response:
-      status: 200
-
   - synopsis: Trigger index upgrade (POST).
     path: /{index}/_upgrade
     method: POST
@@ -38,3 +30,11 @@ chapters:
         ignore_unavailable: true
     response:
       status: 200
+
+  - synopsis: Check index upgrade status (GET).
+    path: /{index}/_upgrade
+    method: GET
+    parameters:
+      index: [movies]
+    response:
+      status: 200