Public API IP rate limiting

[mike12345567]

Description

Adding public API rate limiting, with env variable option, defaults to 120 requests per minute. The environment variable API_RATE_LIMITING can be set to any number to set the limit of requests per minute. For now this is entirely limited to the public API.

This is achieved with the use of koa2-ratelimit - this allows rate limiting per IP and use of a Redis store for managing the limits across a cluster of services.

[shogunpurple]

LGTM! Really nice that we can just plug this library into existing redis infra. Saw that koa2-ratelimit supports other backends too - seems like a nice library 👌

[codecov-commenter]

Codecov Report

Merging #4764 (86f649c) into develop (4906dc6) will increase coverage by 1.59%.
The diff coverage is 70.00%.

@@             Coverage Diff             @@
##           develop    #4764      +/-   ##
===========================================
+ Coverage    67.91%   69.51%   +1.59%     
===========================================
  Files          144      145       +1     
  Lines         4922     4979      +57     
  Branches       761      765       +4     
===========================================
+ Hits          3343     3461     +118     
+ Misses        1105     1066      -39     
+ Partials       474      452      -22     

Impacted Files	Coverage Δ
packages/server/src/api/controllers/application.js	77.61% <ø> (+0.49%)	⬆️
packages/server/src/automations/steps/queryRows.js	95.65% <ø> (ø)
packages/server/src/utilities/workerRequests.js	46.42% <30.76%> (-3.58%)	⬇️
packages/server/src/db/utils.js	73.45% <33.33%> (-1.10%)	⬇️
...ackages/server/src/api/controllers/row/internal.js	82.05% <50.00%> (-0.34%)	⬇️
packages/server/src/threads/query.js	74.19% <50.00%> (-5.63%)	⬇️
packages/server/src/api/routes/utils/validators.js	97.14% <97.14%> (ø)
packages/server/src/api/controllers/table/index.js	71.42% <100.00%> (+0.51%)	⬆️
packages/server/src/api/controllers/webhook.js	91.52% <100.00%> (ø)
packages/server/src/api/index.js	93.54% <100.00%> (+0.44%)	⬆️
... and 14 more

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