Add support for both Qtip and UDP traffic for Server Listeners.

[ProjectsByJackHe]

Description

Currently, we have an execution parameter (QUIC_EXECUTION_CONFIG_FLAG_QTIP) that you set to either process packets via QTIP or normal QUIC/UDP traffic.

For a server listener, that means you can only talk to clients with the same execution profile as you; you either deal over QTIP or QUIC/UDP.

This is inconvenient and sometimes a blocker when you want your listener to accept from clients with varying execution parameters (QTIP through the Azure load balancer, normal QUIC/UDP for on-prem clients)

Changes

This pull-request updates the behavior of QUIC_EXECUTION_CONFIG_FLAG_QTIP: If you set this flag, all client connections created will default to using QTIP unless otherwise specified. Note that the QUIC_EXECUTION_CONFIG_FLAG_QTIP does not impact server Listeners as they will always accept both QUIC/QTIP traffic.

This PR adds an API (connection Get/Set parameter) for client connections to specify whether the connection sends normal QUIC and/or TCP traffic.

Closes: #3516

Testing

Modified a datatest to alternate between creating normal QUIC connections and QTIP connections, where they all ping the same listener. The expectation is all the tests pass.

Documentation

N/A

[codecov]

Codecov Report

Attention: Patch coverage is 23.72881% with 45 lines in your changes missing coverage. Please review.

Project coverage is 48.04%. Comparing base (9073911) to head (6b87771).

Files with missing lines	Patch %	Lines
src/core/connection.c	0.00%	27 Missing ⚠️
src/core/listener.c	45.16%	17 Missing ⚠️
src/core/connection.h	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #4803       +/-   ##
===========================================
- Coverage   86.20%   48.04%   -38.16%     
===========================================
  Files          56       56               
  Lines       17726    17770       +44     
===========================================
- Hits        15281     8538     -6743     
- Misses       2445     9232     +6787     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.