spliting metadata

Reviewed-by: gtema <artem.goncharov@gmail.com>
Co-authored-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-committed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>

otc_metadata/data/documents/ims-public-images.yaml

@@ -0,0 +1,8 @@
+---
+environment: public
+link: /image-management-service/public-images/
+pdf_name: ims-public-images
+rst_location: doc/public-images/source
+service_type: ims
+title: Public Image Introduction
+type: public-images