fix(user fields): missing creationDate in details (#9250)

# Which Problems Are Solved

The `creationDate` property on user search V2 endpoint was missing

# How the Problems Are Solved

Added property in v2 `object.proto` and in the function creating the
details on each call

# Additional Changes
- none
# Additional Context
closes #8552

---------

Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>

internal/api/grpc/org/v2/query.go

@@ -129,6 +129,7 @@ func organizationToPb(organization *query.Org) *org.Organization {
 			Sequence:      organization.Sequence,
 			EventDate:     organization.ChangeDate,
 			ResourceOwner: organization.ResourceOwner,
+			CreationDate:  organization.CreationDate,
 		}),
 		State: orgStateToPb(organization.State),
 	}