fix(api): remove protocol file size limit and ack immediately

[btmorr]

Fixes #3998

An arbitrary (default) file size limit in the API made it impossible to upload protocol files larger than 4Mb. After removing that limit, we discovered that:

1. The API simulates the protocol before sending an 'ack' back to the client, causing the client request to time out
2. The API had log statments that would crash the API server when receiving large files

This PR removes the log statements from the API (and a log statement from the App with the same problem), and removes the file size limit. It also moves the 'ack' response to before simulation, as expected by the App.

[btmorr]

As a follow-up, we should do a performance test on the impact of other logging statements in the API during simulation.

[codecov]

Codecov Report

Merging #4006 into edge will decrease coverage by 0.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##             edge    #4006      +/-   ##
==========================================
- Coverage   57.49%   57.48%   -0.02%     
==========================================
  Files         828      828              
  Lines       23478    23470       -8     
==========================================
- Hits        13499    13491       -8     
  Misses       9979     9979

Impacted Files	Coverage Δ
app/src/rpc/client.js	89.79% <ø> (ø)	⬆️
app/src/robot/api-client/index.js	11.11% <0%> (ø)	⬆️
opentrons/server/rpc.py	89.06% <0%> (-0.44%)	⬇️

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[mcous]

Code looks good and behavior LGTM. Awaiting @Opentrons/py approval before merging

[Laura-Danielle]

lgtm