src/cpp-common/bt2: wrap option with selector field loc. FC API

src/cpp-common/bt2: wrap option with selector field loc. FC API

This patch adds what's needed to the C++ libbabeltrace2 wrappers to
wrap:

* bt_field_class_option_with_selector_field_borrow_selector_field_location_const()
* bt_field_class_option_without_selector_field_location_create()
* bt_field_class_option_with_selector_field_location_bool_create()
* bt_field_class_option_with_selector_field_location_integer_unsigned_create()
* bt_field_class_option_with_selector_field_location_integer_signed_create()

Signed-off-by: Philippe Proulx <eeppeliteloop@gmail.com>
Change-Id: Iaf20856ee2533a061560abf79c91a69b2dab20b5
Reviewed-on: https://review.lttng.org/c/babeltrace/+/8018
Reviewed-on: https://review.lttng.org/c/babeltrace/+/12701
CI-Build: Simon Marchi <simon.marchi@efficios.com>
Tested-by: jenkins <jenkins@lttng.org>