Move OP_CSV from scriptSig to scriptPubKey in bip68-112-113-p2p

Summary:
Prepare for magnetic anomaly with push-only rule

Depends on D2146

Test Plan:

./test/functional/bip68-112-113-p2p.py

Reviewers: #bitcoin_abc, deadalnix, jasonbcox

Reviewed By: #bitcoin_abc, jasonbcox

Subscribers: jasonbcox, teamcity, schancel

Differential Revision: https://reviews.bitcoinabc.org/D2176