!2699 has been merged a bit prematurely and it contained things that are
not used. So remove the unused member variables, functions, fix module
usage strings, and move some functions from headers.
Roc-toolkit log records are captured via a callback and
written to PipeWire log with corresponding verbosity level.
The log.level config parameter limits record verbosity at
the roc-toolkit level.
Incompatible changes between ROC v0.1.X and v0.2.X require
adjusting the ROC modules' code. The largest change is going
from `roc_address` to `roc_endpoint`. There is also a breaking
change, the removal of `local.ip` parameter from module-roc-sink
as `roc_sender_bind()` has been removed.
The API usage was modelled after https://github.com/roc-streaming/roc-pulse
See #1757Fixes#2911
