HTTP stress test improvements (#42313)

HTTP stress test improvements (#42313)

Fixes:
    stress client double read of content fixed
    fixed stress client hangs at start and stop
    leveraged HttpVersionPolicy
    increased pipeline timeout since we doubled the runs
    fixed base docker images to avoid missing IO.Pipelines Kestrel exception.

Re-hauled tracing:
    added server file logging
    added log file rotation

Minor renames.

Contributes to: #42211 and #42198