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>

internal/domain/permission.go

@@ -33,4 +33,6 @@ const (
 	PermissionUserCredentialWrite = "user.credential.write"
 	PermissionSessionWrite        = "session.write"
 	PermissionSessionDelete       = "session.delete"
+	PermissionIDPRead             = "iam.idp.read"
+	PermissionOrgIDPRead          = "org.idp.read"
 )