refactor: Remove negative lock annotations from globals

Summary:

They only make sense for mutexes that are private members. Until cs_main is a private member the negative annotations should be replaced by excluded annotations, which are optional.

This is a backport of core#21598

Test Plan:
With TSAN:

$ git checkout <previous commit hash>
$ ninja &> before.log
$ git checkout pr21598
$ ninja &> after.log
$ grep "negative capability" before.log | wc -l
33
$ grep "negative capability" after.log | wc -l
0

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D10187