ccv: adjust for MIP 1

ccv: adjust for MIP 1

Adjust the clock correlation validation code for MIP 1.

The high level conceptual changes to adapt to are:

 - With MIP 0, the only way to have a known clock origin is for it to be
   the Unix epoch.  In MIP 1, it's possible to have known user-defined
   clock origins.

 - With MIP 0, clock classes are optionally identified with UUIDs.  With
   MIP 1, it's with a (namespace, name, UID) tuple.

The concrete changes are:

 - Pass the MIP version down to
   `ClockCorrelationValidator::validate()`and
   `bt_clock_correlation_validator_validate_message()`.

 - Rename enumerators

   - Unix epoch -> Known origin
   - UUID -> ID (which comprises both UUIDs and (namespace, name, UID)
     tuples)

 - Adjust ClockCorrelationValidator::_validate() where the logic differs
   between MIP 0 and 1.

 - Adjust the error messages given by clients of
   `ClockCorrelationValidator` to reflect the differences between MIP 0
   and 1.

 - Make `MessageComparator` take a graph MIP version, change the way
   `MessageComparator::compare()` compares trace identities based on the
   MIP version.

 - Adjust tests checking clock compatibility problems to run with MIP 0
   and 1, using the right kind of identity depending on the MIP version.

Change-Id: I12a5b5bed27fe6185ab407465901d285cbb23778
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/12785
Reviewed-by: Philippe Proulx <eeppeliteloop@gmail.com>
Tested-by: jenkins <jenkins@lttng.org>