[saket0187]

Closes #7832

Unlink the RPC server lock semaphore when the server is stopped, so temporal tools no longer emit a resource_tracker warning at exit.

Note :- Messenger holds the same kind of lock, but bisecting showed only the CLibrariesInterface lock survives to shutdown, so changing its stop() would fix nothing.

@petrasovaa

[echoix]

Without testing, it looks in the good direction to me. I’m happy to see someone else inspect the inner workings of that specific area of the code. I had such a hard time profiling that, and I’m convinced there’s something else wrong with the mechanism that degrades the performance so much.