fix partition rollout and remove scdone outside finalizing txn

[dorinhogea]

3 things:

• avoid reading llmeta during views update (lock inversion prevention) (ported https://github.com/bloomberg/comdb2/pull/4365 to main)
• remove code and tunable sc_done_same_tran (only on going forward)
• fix scdone for comdb2sc and partition rollouts, where it is sent outside finalizing txn