verification/dot2k: Prepare the frontend for LTL inclusion

verification/dot2k: Prepare the frontend for LTL inclusion

The dot2k tool has some code that can be reused for linear temporal logic
monitor. Prepare its frontend for LTL inclusion:

  1. Rename to be generic: rvgen

  2. Replace the parameter --dot with 2 parameters:
     --class: to specific the monitor class, can be 'da' or 'ltl'
     --spec: the monitor specification file, .dot file for DA, and .ltl
             file for LTL

The old command:

  python3 dot2/dot2k monitor -d wip.dot -t per_cpu

is equivalent to the new commands:

  python3 rvgen monitor -c da -s wip.dot -t per_cpu

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://lore.kernel.org/dea18f7a44374e4db8df5c7e785604bc3062ffc9.1751634289.git.namcao@linutronix.de
Reviewed-by: Gabriele Monaco <gmonaco@redhat.com>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>