Add docs placeholders

Reviewed-by: gtema <artem.goncharov@gmail.com>
Co-authored-by: Goncharov, Artem <artem.goncharov@t-systems.com>
Co-committed-by: Goncharov, Artem <artem.goncharov@t-systems.com>

zuul.yaml

@@ -10,6 +10,8 @@
     pre-run: playbooks/pre.yaml
     run: playbooks/run.yaml
     post-run: playbooks/post.yaml
+    vars:
+      docs_update_data_file: "metadata.yaml"
 
 - job:
     name: otc-doc-exports-convert-compute
@@ -25,7 +27,7 @@
       - templates
     provides: otc-doc-exports-convert-compute
     vars:
-      docs_update_data_file: "docs_compute.yaml"
+      docs_service_category: "compute"
 
 - job:
     name: otc-doc-exports-convert-big-data
@@ -39,7 +41,7 @@
       - roles
       - templates
     vars:
-      docs_update_data_file: "docs_big-data.yaml"
+      docs_service_category: "big_data"
 
 - project:
     merge-mode: squash-merge