CLI: Retry on connection reset

[Porges]

In our integration test run we are seeing some connection-reset errors which causes the CLI operation to fail.

To fix this:

1. Set TCP-KeepAlive to keep Azure load balancer connections alive longer than the default timeout (4 minutes).
2. Treat ConnectionResetError as retryable.

[codecov-commenter]

Codecov Report

Merging #2468 (d4d19a6) into main (0c4cd54) will increase coverage by 0.14%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2468      +/-   ##
==========================================
+ Coverage   29.88%   30.03%   +0.14%     
==========================================
  Files         288      288              
  Lines       35180    35324     +144     
==========================================
+ Hits        10513    10609      +96     
- Misses      24667    24715      +48     

Impacted Files	Coverage Δ
src/ApiService/ApiService/onefuzzlib/Config.cs	0.00% <0.00%> (ø)
src/agent/onefuzz-task/src/tasks/merge/generic.rs	0.00% <0.00%> (ø)
src/agent/onefuzz-task/src/tasks/fuzz/generator.rs	0.00% <0.00%> (ø)
src/agent/onefuzz-task/src/tasks/report/generic.rs	0.00% <0.00%> (ø)
...rc/agent/onefuzz-task/src/tasks/coverage/dotnet.rs	0.00% <0.00%> (ø)
...rc/agent/onefuzz-task/src/tasks/fuzz/supervisor.rs	0.00% <0.00%> (ø)
...c/agent/onefuzz-task/src/tasks/analysis/generic.rs	0.00% <0.00%> (ø)
...c/agent/onefuzz-task/src/tasks/coverage/generic.rs	0.00% <0.00%> (ø)
...agent/onefuzz-task/src/tasks/regression/generic.rs	0.00% <0.00%> (ø)
...ent/onefuzz-task/src/tasks/regression/libfuzzer.rs	0.00% <0.00%> (ø)
... and 6 more

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[Porges]

Doing a check-pr run first to validate.

[Porges]

Didn't cause any problems, at least.