Network Stream benchmarks initial implementation

[liveans]

Adds benchmark for NetworkStream
Three different scenarios implemented:

• ConnectionEstablishment
• ReadWrite
• Rps

[sebastienros]

FYI, a related one I made to measure how many packets per second a set of machines can handle.

https://github.com/sebastienros/PacketsPerSecond/blob/master/Program.cs

[liveans]

Currently dealing with a task in QUIC, I plan to get back to this early next week.

/cc: @CarnaViire

[liveans]

It's ready for review now @CarnaViire, there are fields and methods which is duplicating with Tls but decided not to touch them for now, I'll address them as a follow-up later, want merge this first.