Include height and coinbase flag in all txos.

Summary: Right now, only the last UTXO from a transaction contains these information. If we are going to move from a per tx to a per txo model, as started in D342 , then this needs to change.

Test Plan:

make check
../qa/pull-tester/rpc-tests.py -extended

Reviewers: freetrader, sickpig, awemany, kyuupichan, #bitcoin_abc

Reviewed By: freetrader, #bitcoin_abc

Differential Revision: https://reviews.bitcoinabc.org/D365