Increase Max MTU to 4096

[nibanks]

Description

Trying out what happens with larger MTUs

Testing

Automation

Documentation

None

[nibanks]

/azp run perf

[azure-pipelines]

Azure Pipelines could not run because the pipeline triggers exclude this branch/path.

[codecov]

Codecov Report

Merging #3247 (6f6c286) into main (649f971) will decrease coverage by 0.33%.
Report is 1 commits behind head on main.
The diff coverage is 79.86%.

@@            Coverage Diff             @@
##             main    #3247      +/-   ##
==========================================
- Coverage   86.84%   86.51%   -0.33%     
==========================================
  Files          56       56              
  Lines       16712    16854     +142     
==========================================
+ Hits        14513    14582      +69     
- Misses       2199     2272      +73     

Files	Coverage Δ
src/core/connection.c	81.84% <ø> (+0.03%)	⬆️
src/core/loss_detection.c	89.84% <100.00%> (+0.06%)	⬆️
src/core/send.c	88.87% <ø> (ø)
src/core/send.h	87.93% <ø> (ø)
src/core/sent_packet_metadata.c	100.00% <100.00%> (ø)
src/core/sent_packet_metadata.h	100.00% <ø> (ø)
src/core/stream_set.c	94.26% <ø> (-0.32%)	⬇️
src/core/frame.c	87.32% <60.00%> (-0.22%)	⬇️
src/core/stream.h	92.03% <75.00%> (-1.30%)	⬇️
src/core/stream_send.c	94.78% <90.47%> (-0.52%)	⬇️
... and 2 more

... and 8 files with indirect coverage changes