Add support for lazy listeners when running with chalice local

[jlujan-invitae]

Addresses the underlying issue in #267.� Add support to ChaliceSlackRequestHandler for lazy listeners when running through chalice local . The current method uses boto('lambda').invoke to invoke an actual lambda function which does not work when developing or running locally with chalice local. This PR implements LocalLambdaClient sub-classed from chalice.test.BaseClient with overload of invoke to match boto's capitalized function signature.

• slack_bolt.App and/or its core components
• slack_bolt.async_app.AsyncApp and/or its core components
• Adapters in slack_bolt.adapter
• Document pages under /docs
• Others

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Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you are agreeing to those rules.

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've run ./scripts/install_all_and_run_tests.sh after making the changes.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #270 (e604bab) into main (57fdb45) will increase coverage by 0.24%.
The diff coverage is 100.00%.

❗ Current head e604bab differs from pull request most recent head a497fac. Consider uploading reports for the commit a497fac to get more accurate results

@@            Coverage Diff             @@
##             main     #270      +/-   ##
==========================================
+ Coverage   91.25%   91.50%   +0.24%     
==========================================
  Files         160      160              
  Lines        4983     5000      +17     
==========================================
+ Hits         4547     4575      +28     
+ Misses        436      425      -11     

Impacted Files	Coverage Δ
slack_bolt/adapter/aws_lambda/chalice_handler.py	89.61% <100.00%> (+2.94%)	⬆️
slack_bolt/listener/thread_runner.py	93.39% <0.00%> (+3.77%)	⬆️
...adapter/aws_lambda/chalice_lazy_listener_runner.py	94.73% <0.00%> (+36.84%)	⬆️

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[seratch]

@jlujan-invitae Thanks for taking the time to make this improvement! The changes already look great to me 👍

One thing I wanted to know is the possibility to have some tests for the pattern in https://github.com/slackapi/bolt-python/blob/main/tests/adapter_tests/aws/test_aws_chalice.py .

If we can add a basic-level (in other words, normal patterns only) unit test emulating chalice local behaviors, it'd be valuable for its maintenance. If some issues or limitation prevent us from having tests for this, it's okay for now. Thoughts?

[jlujan-invitae]

Sure thing. I will attempt to write tests to cover the additions. Might take me a few days with my current schedule.

[jlujan-invitae]

@seratch, I think this is in good shape. Might give it a once over. Looks like it improved coverage some.

[seratch]

@jlujan-invitae Thanks! The added test looks great to me 👍