Change Details

``` Switch CNode::m_ping_start and CNetMessage::m_time to mockable time, so that tests can be added. Mockable time is also type-safe, since it uses std::chrono ``` Backport of core PR18638.

``` Switch CNode::m_ping_start and CNetMessage::m_time to mockable time, so that tests can be added. Mockable time is also type-safe, since it uses std::chrono ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/18638 | PR18638]].

``` Switch CNode::m_ping_start and CNetMessage::m_time to mockable time, so that tests can be added. Mockable time is also type-safe, since it uses std::chrono ``` Backport of core [[https://github.com/bitcoin/bitcoin/pull/18638 | PR18638]].