[UX] Write to log search space that used and save the pipeline space used as a YAML

[eddiebergman]

Right now, there's no indication what pipeline space got used, either as a log message or as a file to lookup either. This could be done at the same time point where the runtime.py saves the optimizer set up to the file-system.

neps/neps/runtime.py

Lines 883 to 891 in d05b2ef

	with shared_state.sync(lock=True):
	if not shared_state.paths.optimizer_info_file.exists():
	serialize(
	optimizer_info,
	shared_state.paths.optimizer_info_file,
	sort_keys=False,
	)
	else:
	shared_state.check_optimizer_info_on_disk_matches(optimizer_info)