Add multi-vector support to search requests (Azure#24614)

Author: Careyjmac

specification/search/data-plane/Azure.Search/preview/2023-07-01-Preview/searchindex.json

@@ -2496,6 +2496,13 @@
         "vector": {
           "$ref": "#/definitions/Vector",
           "description": "The query parameters for vector and hybrid search queries."
+        },
+        "vectors": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/Vector"
+          },
+          "description": "The query parameters for multi-vector search queries."
         }
       },
       "description": "Parameters for filtering, sorting, faceting, paging, and other search query behaviors."