docs: generate OAS manually for 2.7.0 (#12158)

* original changes

* changes

* fixes for delete operations

* generate oas

www/apps/api-reference/specs/admin/paths/admin_campaigns.yaml

@@ -62,6 +62,10 @@ get:
     - cookie_auth: []
     - jwt_token: []
   x-codeSamples:
+    - lang: JavaScript
+      label: JS SDK
+      source:
+        $ref: ../code_samples/JavaScript/admin_campaigns/get.js
     - lang: Shell
       label: cURL
       source:
@@ -237,6 +241,10 @@ post:
                     `additional_data` parameter.
           description: The campaign's details.
   x-codeSamples:
+    - lang: JavaScript
+      label: JS SDK
+      source:
+        $ref: ../code_samples/JavaScript/admin_campaigns/post.js
     - lang: Shell
       label: cURL
       source: