Add the `log-session` to the black hole component

[Washipp]

When all log-sessions are routed to the same place and displayed in a terminal, it can get cluttered when a lot of logging happens (for example when fuzzing). The black hole component currently does not provide the log session.

Suggested fix in commit: edb69fd

[smhmeier]

Added the same feature in a new commit using a gapfruit account 7bce1a9. This should solve the licensing issue, though a copyright notice could be required.

[smhmeier]

@chelmuth see updated commit 892f0e6

[chelmuth]

Merged to staging.

fdb740f Add log-session to the black hole component
a4ca827 fixup "Add log-session to the black hole component" (Updated log.h according to chelmuth reply)
b8627c4 fixup "Add log-session to the black hole component" (adapt to staging, style, test)