Description of the problem, including code/CLI snippet

PLANNER access was added to gitlab.const.AccessLevel but is still mising as gitlab.const.PLANNER_ACCESS and in gitlab.const.all

Expected Behavior

It should be possible to access gitlab.const.PLANNER_ACCESS similar to gitlab.const.DEVELOPER_ACCESS.

Actual Behavior

Currently, PLANNER_ACCESS can only be imported via gitlab.const.AccessLevel.PLANNER

Specifications

• python-gitlab version: 6.0.0