node/coinstats: Pass in BlockManager to GetUTXOStats

Summary:
This is a backport of core#21270 [6/12] and core#21525[5/10]
https://github.com/bitcoin/bitcoin/pull/21270/commits/106bcd4f390137904b5579cfef023fb8a5c8b4b5
https://github.com/bitcoin/bitcoin/pull/21525/commits/07156eb387ea580be5e2ce4a1744992ce7575903

Depends on D11420

Test Plan: ninja all check-all

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D11422