cleanup: Add a `TOX_HIDE_DEPRECATED` check to hide deprecated symbols. #6212

Job	Run time
docker-esp32	1m 44s
docker-clusterfuzz	30s
docker-bootstrap-node	1m 0s
docker-fuzzer	10s
docker-toxcore-js	2m 1s
docker-windows-mingw (32)	7m 19s
docker-windows-mingw (64)	7m 2s
docker-bootstrap-node-websocket	15s
	20m 1s

Provide feedback