Change Details

* logging: Add member for arbitrary print callbacks * test: Add ASSERT_DEBUG_LOG to unit test framework This is a backport of Core PR16540

* logging: Add member for arbitrary print callbacks * test: Add ASSERT_DEBUG_LOG to unit test framework This is a backport of Core [[https://github.com/bitcoin/bitcoin/pull/16540 | PR16540]]

* logging: Add member for arbitrary print callbacks * test: Add ASSERT_DEBUG_LOG to unit test framework This is a backport of Core [[https://github.com/bitcoin/bitcoin/pull/16540 | PR16540]]