cli: don't include version.h in babeltrace2-cfg-cli-params-arg.c

The only thing provided by version.h is the GIT_VERSION macro, which
this file doesn't use.  Because it includes that header file, it is
unnecessarily rebuilt after we do or amend a git commit.

Change-Id: Ic7526f09f62896d5dfc299f15205fe9982060c4d
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/2065
Tested-by: jenkins <jenkins@lttng.org>
Reviewed-by: Francis Deslauriers <francis.deslauriers@efficios.com>