Memory leak when unpublishing tracks multiple times

[thepacketloss]

When unpublishing tracks multiple times there will be some memory leaks. I used heaptrack in order to track memory leak location and it seems that it's from VP8 - VP9 and AV1 encoders

for snippet you can get it from other issue that I created :

https://github.com/livekit/rust-sdks/issues/543

I will attach heaptrack file and result screenshot.

heaptrack.zip