feat(wstransport): support concurrent accept (v2)

[fcecin]

NOTE: This is a draft PR; it depends on status-im/nim-websock#181 and addresses bug logos-messaging/logos-delivery#3634.

Rationale

Same as for the previous PR that aimed to address the same issue.

Proposed solution

The solution is to spawn a connection accept dispatcher task as part of WsTransport start.

The dispatcher task is responsible for pulling client sockets out via the new HttpServer.acceptStream, which is less problematic than attempting to multitask the StreamServer.accept from Chronos.

Once a client stream is read, HTTP header validation and timeout is parallelized by asyncSpawn'ing tasks to call HttpServer.processHttpRequest for each incoming client connection.

Changes

• use HttpServer.acceptStream and HttpServer.processHttpRequest for concurrent accept (depends on: feat(wstransport): add support for concurrent accept status-im/nim-websock#181)
• set DefaultConcurrentAccepts to 200 connections
• fix parallel streaming data test
• remove use of deprecated handshakeTimeout HttpServer param

[codecov-commenter]

Codecov Report

❌ Patch coverage is 86.92308% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.60%. Comparing base (0b3a7e0) to head (44557cc).

Files with missing lines	Patch %	Lines
libp2p/transports/wstransport.nim	86.92%	17 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1937      +/-   ##
==========================================
- Coverage   83.68%   83.60%   -0.08%     
==========================================
  Files         145      145              
  Lines       23830    23868      +38     
  Branches       12       12              
==========================================
+ Hits        19941    19954      +13     
- Misses       3889     3914      +25     

Files with missing lines	Coverage Δ
libp2p/transports/wstransport.nim	85.11% <86.92%> (+0.30%)	⬆️

... and 68 files with indirect coverage changes

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[fcecin]

About the CI failures, I think the performance.yml and interop.yml workflows might not be pulling deps from .pinned, which is why they fail to see the new processHttpRequest proc from the pinned nim-websock commit.