Enabling network statistics crashes Tribler

[qstokkink]

Clicking the enable statistics setting and then restarting causes the following crash:

Traceback (most recent call last):
  File "src/run_tribler.py", line 105, in <module>
    asyncio.run(main())
  File "/usr/lib/python3.10/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "/usr/lib/python3.10/asyncio/base_events.py", line 649, in run_until_complete
    return future.result()
  File "src/run_tribler.py", line 86, in main
    session = Session(config)
  File "src/tribler/core/session.py", line 88, in __init__
    self.ipv8 = IPv8(self.config.get("ipv8"), enable_statistics=self.config.get("statistics"))
  File "pyipv8/ipv8_service.py", line 108, in __init__
    self.endpoint = DispatcherEndpoint(list(endpoint_args.keys()), **endpoint_args)
  File "pyipv8/ipv8/messaging/interfaces/dispatcher/endpoint.py", line 91, in __init__
    self.interfaces = {interface: INTERFACES[interface](**(kwargs.get(interface, {}))) for interface in interfaces}
  File "pyipv8/ipv8/messaging/interfaces/dispatcher/endpoint.py", line 91, in <dictcomp>
    self.interfaces = {interface: INTERFACES[interface](**(kwargs.get(interface, {}))) for interface in interfaces}
TypeError: UDPEndpoint.__init__() got an unexpected keyword argument 'worker_threads'

[qstokkink]

I think the following happens:

1. Tribler runs with Rust enhancements. The worker_threads setting is saved:

TriblerExperimental/src/tribler/core/session.py

Line 54 in fec2f27

ifc["worker_threads"] = session.config.get("tunnel_community/max_circuits")

2. The statistics are enabled and Tribler is restarted. The nullcontext does not do anything because the statistics are incompatible with the Rust enhancements and Tribler crashes due to the leftover setting.

TriblerExperimental/src/tribler/core/session.py

Lines 87 to 88 in fec2f27

	with nullcontext() if self.config.get("statistics") else rust_enhancements(self):
	self.ipv8 = IPv8(self.config.get("ipv8"), enable_statistics=self.config.get("statistics"))

---

If the Rust enhancements are not available at all, we do properly clean the config setting:

TriblerExperimental/src/tribler/core/session.py

Lines 60 to 64 in fec2f27

	except ImportError:
	logger.info("Rust endpoint not found (pip install ipv8-rust-tunnels).")
	for ifc in session.config.configuration["ipv8"]["interfaces"]:
	if ifc["interface"] == "UDPIPv4":
	ifc.pop("worker_threads")