Add __pycache__ to .gitignore and remove tracked pyc file

Agent-Logs-Url: https://github.com/art-daq/artdaq-daqinterface/sessions/f2a72f82-1eea-4ab6-8621-34586fa28f3c

Co-authored-by: eflumerf <61473357+eflumerf@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -7,3 +7,4 @@ obj/*
 core.*
 spack-build-*
 build-linux-*
+rc/control/__pycache__/