cli: remove `run` and `convert` commands' --name option

cli: remove `run` and `convert` commands' --name option

There are currently two ways of setting a component's name:

  - Using the --name option
  - Using the NAME: prefix to the --component option

Having two ways of doing the same thing is not really useful here.

Supporting the --name option complicates the code a little bit: we have
to track whether the current component's name has been set, so that when
we start a new --component, we can generate a name if needed.

This patch removes the --name option in favor of always using the NAME:
prefix of --component.  This way, as soon as we handle --component, we
know if the user has provided a name or not, and if not, we can generate
one immediatly (applies only in the convert command; in the run command, the
user must provide a name).

Change-Id: Id278e9d110e4ea415f66538ac55e9459e49b1d0e
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/1805
Tested-by: jenkins <jenkins@lttng.org>
Reviewed-by: Philippe Proulx <eeppeliteloop@gmail.com>