mgr/telemetry: add separate channels
'basic' is the basic cluster stats (version, size, etc)
'crash' is the crash dumps.
By default these are both on, but they can be selectively enabled or
disabled.
New channels will follow.
Signed-off-by: Sage Weil <sage@redhat.com>
(cherry picked from commit
f3a3ccb52fa5a7b24f8d11138b5b51345865547e)
Conflicts:
src/pybind/mgr/telemetry/module.py
Don't backport code related to the 'crash' module, and adjust
how we read option variables (luminous goes through a config
map, instead of master's that goes through class attributes)