Tweak lemmas for discrete and total `cmra_update`
The existing lemmas cmra_discrete_update
and cmra_discrete_updateP
required both CmraDiscrete
and CmraTotal
.
This MR renames cmra_discrete_update
→ cmra_discrete_total_update
and cmra_discrete_updateP
→ cmra_discrete_total_updateP
. It uses the existing lemmas for versions with only CmraDiscrete
.