OBS: add yaml files for 3rd-party SDK documents (Java, C, Go)

Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Dmitrii Sabelnikov <Dmitriy.Sabelnikov@t-systems.com>
Co-committed-by: Dmitrii Sabelnikov <Dmitriy.Sabelnikov@t-systems.com>

otc_metadata/data/documents/obs_3rd_party-c-sdk.yaml

@@ -0,0 +1,13 @@
+---
+hc_location: sdk/c-devg-obs
+html_location: docs/obs_3rd_party/c_sdk
+link: /object-storage-service-3rd-party/c-sdk/
+rst_location: doc/c-sdk/source
+service_type: obs_3rd_party
+title: C SDK
+type: c-sdk
+cloud_environments:
+  - name: eu_de
+    visibility: public
+    pdf_visibility: public
+    pdf_enabled: false

otc_metadata/data/documents/obs_3rd_party-go-sdk.yaml

@@ -0,0 +1,13 @@
+---
+hc_location: sdk/go-devg-obs
+html_location: docs/obs_3rd_party/go_sdk
+link: /object-storage-service-3rd-party/go-sdk/
+rst_location: doc/go-sdk/source
+service_type: obs_3rd_party
+title: Go SDK
+type: go-sdk
+cloud_environments:
+  - name: eu_de
+    visibility: public
+    pdf_visibility: public
+    pdf_enabled: false

otc_metadata/data/documents/obs_3rd_party-java-sdk.yaml

@@ -0,0 +1,13 @@
+---
+hc_location: sdk/java-devg-obs
+html_location: docs/obs_3rd_party/java_sdk
+link: /object-storage-service-3rd-party/java-sdk/
+rst_location: doc/java-sdk/source
+service_type: obs_3rd_party
+title: Java SDK
+type: java-sdk
+cloud_environments:
+  - name: eu_de
+    visibility: public
+    pdf_visibility: public
+    pdf_enabled: false