do not log yamux buffers without sanitization (trace log level)

[etan-status]

The Msg Rcv trace log does not sanitize the buffer against binary data, which may trigger oddities in the terminal displaying it, as binary control characters get interpreted. Using shortLog instead is consistent with Mplex and displays the start and end as hex. It makes more sense anyway because the exchanged messages actually do contain binary headers very often, and displaying these as string is most likely incorrect.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.80%. Comparing base (6c87348) to head (b66a1c3).

Additional details and impacted files

@@             Coverage Diff              @@
##           unstable    #1046      +/-   ##
============================================
+ Coverage     82.77%   82.80%   +0.03%     
============================================
  Files            91       91              
  Lines         15604    15604              
============================================
+ Hits          12916    12921       +5     
+ Misses         2688     2683       -5     

Files	Coverage Δ
libp2p/muxers/yamux/yamux.nim	88.34% <100.00%> (ø)

... and 3 files with indirect coverage changes