feat(ops/modules): launch teleirc for Volga Sprint

For the duration of the sprint, this bot will take care of
synchronising the IRC channel with the Telegram group.

After the sprint, it will be removed again.

Change-Id: I6d5b1316fc85ddd26adf55e31f6bff742907fc24
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11727
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

ops/secrets/secrets.nix

@@ -9,6 +9,9 @@ let
 
     # zamalek
     "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIDBRXeb8EuecLHP0bW4zuebXp4KRnXgJTZfeVWXQ1n1R"
+
+    # khamovnik
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAID1ptE5HvGSXxSXo+aHBTKa5PBlAM1HqmpzWz0yAhHLj"
   ];
 
   aspen = [
@@ -47,6 +50,7 @@ in
   "owothia.age" = whitbyDefault;
   "panettone.age" = whitbyDefault;
   "smtprelay.age" = whitbyDefault;
+  "teleirc.age" = whitbyDefault;
   "tf-buildkite.age" = terraform;
   "tf-glesys.age" = terraform;
   "tf-keycloak.age" = terraform;