treewide: use more specific object_path type

The sdbus++ tool allows the YAML to specify either "path" or
"object_path".  Switch to "object_path" everywhere for consistency
and clarity.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I60c51b2ece5fc4cb23d05ce5151301db3dcddf3a
diff --git a/yaml/xyz/openbmc_project/Certs/Authority.interface.yaml b/yaml/xyz/openbmc_project/Certs/Authority.interface.yaml
index 98c940c..e081bfa 100644
--- a/yaml/xyz/openbmc_project/Certs/Authority.interface.yaml
+++ b/yaml/xyz/openbmc_project/Certs/Authority.interface.yaml
@@ -13,7 +13,7 @@
 
       returns:
           - name: path
-            type: path
+            type: object_path
             description: >
                 The object path of an object that implements, at a minimum,
                 xyz.openbmc_project.Certs.Entry and xyz.openbmc_project.Object.Delete