feat: idp v2 api GetIDPByID (#8425)

# Which Problems Are Solved

GetIDPByID as endpoint in the API v2 so that it can be available for the
new login.

# How the Problems Are Solved

Create GetIDPByID endpoint with IDP v2 API, throught the GetProviderByID
implementation from admin and management API.

# Additional Changes

- Remove the OwnerType attribute from the response, as the information
is available through the resourceOwner.
- correct refs to messages in proto which are used for doc generation
- renaming of elements for API v3

# Additional Context

Closes #8337

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

docs/docusaurus.config.js

@@ -356,6 +356,14 @@ module.exports = {
                 categoryLinkSource: "auto",
             },
           },
+          idp_v2: {
+            specPath: ".artifacts/openapi/zitadel/idp/v2/idp_service.swagger.json",
+            outputDir: "docs/apis/resources/idp_service_v2",
+            sidebarOptions: {
+              groupPathsBy: "tag",
+              categoryLinkSource: "auto",
+            },
+          },
         },
       },
     ],