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
The main behavior change is that now all Server listeners created will accept both QTIP and QUIC+udp traffic by default when XDP is configured and running correctly.

To support this new design and make testing a bit easier, we also add a knob at the connection layer to control whether a connection created is going to send QUIC+udp/QTIP.

This pull-request also 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 assuming XDP is configured and running correctly.

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

All modified and coverable lines are covered by tests ✅

Project coverage is 85.25%. Comparing base (9073911) to head (90a469a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4803      +/-   ##
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- Coverage   86.20%   85.25%   -0.96%     
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  Files          56       56              
  Lines       17726    17751      +25     
==========================================
- Hits        15281    15133     -148     
- Misses       2445     2618     +173     

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