968b76f77c Add missing cs_KeyStore lock (practicalswift)
4bcd5bb87d Add locking annotations for variables guarded by cs_KeyStore (practicalswift)
Pull request description:
- Add Clang thread safety annotations for variables guarded by cs_KeyStore
- Add missing cs_KeyStore lock
Tree-SHA512: 7d93513c2da0cd564b9f1e75aa5156a454a4133eb845020fde8872e685dd5758353e93c33364aeea4a812c08353a810494e503a5ce160cc5be0af5af4bb2e6d7
Backport of Core PR13114
https://github.com/bitcoin/bitcoin/pull/13114/