feat: expose auto acknowledge for function handlers

[WilliamBergamin]

This PR exposes the auto_acknowledge flag at the at the function listener initialization level. This will allow the developer to build functions that call complete or fail before ack() (responding) the the slack request.

This will be used for dynamic options support

NOTE: the 3 second time out may prove to be a limitation since function have a timeout of 15 seconds, a follow up PR may be needed to imporve this behavior

Category

• 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

Requirements

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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.09%. Comparing base (56d5ca3) to head (a4421e6).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1173      +/-   ##
==========================================
+ Coverage   92.02%   92.09%   +0.07%     
==========================================
  Files         195      195              
  Lines        6631     6631              
==========================================
+ Hits         6102     6107       +5     
+ Misses        529      524       -5     

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[seratch]

Looks good to me; Thanks for working on this!