rpc, index: Add verbose amounts tracking to Coinstats index

Summary:
This is a backport of core#19521 [11/17] and core#22047 [2/3]
https://github.com/bitcoin/bitcoin/pull/19521/commits/2501576eccb08af80471c7b7b843b189ad6758c0
https://github.com/bitcoin/bitcoin/pull/22047/commits/fb65dde147f63422c4148b089c2f5be0bf5ba80f

Depends on D11604

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D11605