Add option to change log level for websocket logs

[tinexw]

What did you implement

Add option to change the log level of websocket logs to ERROR. Note that I did not add an option to disable logs on purpose in order to keep the change small.

How can we verify it

service: serverless-ws-test

provider:
  name: aws
  logs:
    websocket:
      level: ERROR
  runtime: nodejs12.x
  websocketsApiName: custom-websockets-api-name

functions:
  connectionHandler:
    handler: handler.connectionHandler
    events:
      - websocket:
          route: $connect
  defaultHandler:
    handler: handler.defaultHandler
    events:
      - websocket: $default

1. Run sls deploy
2. Open the Logs/Tracing settings of the API gateway.
3. Should look like this:
4. Change level: ERROR to level: INFO in the serverless.yml
5. Check that the Log Level in the Logs/Tracing settings was changed to INFO

Todos

Useful Scripts

• npm run test-ci --> Run all validation checks on proposed changes
• npm run lint-updated --> Lint all the updated files
• npm run lint:fix --> Automatically fix lint problems (if possible)
• npm run prettier-check-updated --> Check if updated files adhere to Prettier config
• npm run prettify-updated --> Prettify all the updated files

• Write and run all tests
• Write documentation
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES
Is it a breaking change?: NO

[codecov-io]

Codecov Report

Merging #7035 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #7035      +/-   ##
=========================================
- Coverage    88.5%   88.5%   -0.01%     
=========================================
  Files         229     230       +1     
  Lines        8428    8461      +33     
=========================================
+ Hits         7459    7488      +29     
- Misses        969     973       +4

Impacted Files	Coverage Δ
...aws/package/compile/events/websockets/lib/stage.js	100% <100%> (ø)	⬆️
.../compile/events/apiGateway/lib/hack/updateStage.js	95.89% <0%> (-0.54%)	⬇️
lib/plugins/aws/customResources/index.js	98.52% <0%> (-0.14%)	⬇️
lib/plugins/aws/invokeLocal/index.js	76.36% <0%> (ø)	⬆️
lib/plugins/aws/customResources/generateZip.js	88.46% <0%> (ø)

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[pmuens]

Great. Thanks for working on this @tinexw 👍

I just tested it and it works as expected. I updated the serverless.yml doc reference. I'd say it's GTM