Have api manager use singleton pattern

[collijk]

Background

The api manager came in a little hot and one of the things we missed was it's inconsistent method of being used as a singleton. The class was instantiated at the module level and then the instance was imported in other modules. This PR revises the singleton implementation to use tools standard in the package.

Changes

• Make APIManager a subclass of AbstractSingleton
• Remove the module level instance
• Do a little cleanup of configuration usage (the debug stuff was well-intentioned but doing the job of the logging system)
• Update manager usage across the rest of the package.

Documentation

N/A

Test Plan

Small CI updates, but otherwise this class is already covered.

PR Quality Checklist

• My pull request is atomic and focuses on a single change.
• I have thoroughly tested my changes with multiple different prompts.
• I have considered potential risks and mitigations for my changes.
• I have documented my changes clearly and comprehensively.
• I have not snuck in any "extra" small tweaks changes

[codecov]

Codecov Report

Patch coverage: 68.75% and project coverage change: -7.30 ⚠️

Comparison is base (4241fbb) 50.73% compared to head (bef6c1d) 43.44%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3269      +/-   ##
==========================================
- Coverage   50.73%   43.44%   -7.30%     
==========================================
  Files          65       65              
  Lines        2935     2935              
  Branches      493      492       -1     
==========================================
- Hits         1489     1275     -214     
- Misses       1326     1590     +264     
+ Partials      120       70      -50     

Impacted Files	Coverage Δ
autogpt/memory/base.py	72.22% <ø> (-2.78%)	⬇️
autogpt/prompts/prompt.py	0.00% <0.00%> (-56.87%)	⬇️
autogpt/chat.py	22.78% <50.00%> (-41.32%)	⬇️
autogpt/llm_utils.py	45.87% <66.66%> (-12.08%)	⬇️
autogpt/api_manager.py	93.18% <88.88%> (+1.87%)	⬆️

... and 11 files with indirect coverage changes

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1 Ignored Deployment

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)	Visit Preview		Apr 26, 2023 4:34pm

[ntindle]

Wait why does the debug flag exist at all? Can’t we pass —debug and logger handle it