Remove dependency on RecyclableMemoryStream

[BalassaMarton]

...and use ArrayPoolBufferWriter instead

[codecov]

Codecov Report

Merging #242 (2aa800f) into main (833c7c4) will increase coverage by 0.10%.
The diff coverage is 71.42%.

@@            Coverage Diff             @@
##             main     #242      +/-   ##
==========================================
+ Coverage   72.83%   72.94%   +0.10%     
==========================================
  Files         139      139              
  Lines        4624     4628       +4     
  Branches      139      139              
==========================================
+ Hits         3368     3376       +8     
+ Misses       1255     1251       -4     
  Partials        1        1              

Impacted Files	Coverage Δ
...ing/dotnet/src/Core/MessageBufferJsonExtensions.cs	100.00% <ø> (ø)
...src/Client/Client/WebSocket/WebSocketConnection.cs	55.83% <63.63%> (-0.69%)	⬇️
...src/Server/Server/WebSocket/WebSocketConnection.cs	73.04% <100.00%> (-0.24%)	⬇️

... and 1 file with indirect coverage changes