Enable APIG docs for public HC release

Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-committed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>

otc_metadata/data/documents/apig-api-ref.yaml

@@ -1,6 +1,5 @@
 ---
 hc_location: api/apig
-environment: internal
 html_location: docs/apig/api-ref
 link: /api-gateway/api-ref/
 pdf_name: apig-api-ref

otc_metadata/data/documents/apig-umn.yaml

@@ -1,6 +1,5 @@
 ---
 hc_location: usermanual/apig
-environment: internal
 html_location: docs/apig/umn
 link: /api-gateway/umn/
 pdf_name: apig-umn

otc_metadata/data/services/apig.yaml

@@ -1,5 +1,5 @@
 ---
-environment: internal
+environment: public
 repositories:
 - environment: internal
   repo: docs/api-gateway
@@ -7,10 +7,12 @@ repositories:
 - environment: public
   repo: opentelekomcloud-docs/api-gateway
   type: github
-service_category: big_data
+service_category: application
 service_title: API Gateway (APIG)
 service_type: apig
 service_uri: api-gateway
 teams:
 - name: docs-bigdata-ai-rw
   permission: write
+- name: docs-orchestration-rw
+  permission: write