[OpenAPI] Edit multi search and scroll API (#3053)

(cherry picked from commit e924f04)

Author: lcawl

docs/overlays/elasticsearch-shared-overlays.yaml

@@ -181,12 +181,6 @@ actions:
           x-displayName: Script - Get languages
         - name: search
           x-displayName: Search
-        - name: msearch
-          x-displayName: Search - Multi search
-        - name: scroll
-          x-displayName: Search - Scroll
-        - name: terms_enum
-          x-displayName: Search - Terms enum
         - name: search_application
           x-displayName: Search application
         - name: searchable_snapshots