lib: record effective MIP version in field and trace classes

lib: record effective MIP version in field and trace classes

We will need access to the MIP version in order to add MIP version
preconditions in various functions.

Change-Id: I47ecd962eb56826ea677fdeaa0dc28f7192eac7a
Reviewed-on: https://review.lttng.org/c/babeltrace/+/7314
CI-Build: Simon Marchi <simon.marchi@efficios.com>
Tested-by: jenkins <jenkins@lttng.org>
Reviewed-by: Philippe Proulx <eeppeliteloop@gmail.com>
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/7210