recurring-donations: add netns

- Adds recurring-donations to netns-isolation.services
- Adds cfg.enforceTor to bring recurring-donations in line with other
  services
- Removes torsocks dependency in favor of `curl --socks-hostname`

modules/presets/secure-node.nix

@@ -131,6 +131,8 @@ in {
 
     services.nanopos.enforceTor = true;
 
+    services.recurring-donations.enforceTor = true;
+
     services.nix-bitcoin-webindex.enforceTor = true;