configuration: migrate schema to api_server

[ssheng]

What does this PR address?

Move access logging format configuration from a top level config to under api_server.logging.access for semantic correctness.

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• Did you read through contribution guidelines and follow development guidelines?
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• Did you write tests to cover your changes?

[codecov]

Codecov Report

Merging #3046 (208ce99) into main (76ade96) will decrease coverage by 1.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #3046      +/-   ##
==========================================
- Coverage   62.33%   61.22%   -1.12%     
==========================================
  Files         132      132              
  Lines       11522    11522              
  Branches     1923     1923              
==========================================
- Hits         7182     7054     -128     
- Misses       3905     4035     +130     
+ Partials      435      433       -2     

Impacted Files	Coverage Δ
bentoml/_internal/configuration/containers.py	69.29% <ø> (ø)
bentoml/_internal/log.py	79.68% <100.00%> (ø)
bentoml/_internal/frameworks/torchscript.py	0.00% <0.00%> (-92.00%)	⬇️
bentoml/_internal/frameworks/common/pytorch.py	0.00% <0.00%> (-69.48%)	⬇️
bentoml/_internal/runner/strategy.py	76.27% <0.00%> (-10.17%)	⬇️
bentoml/_internal/runner/runner_handle/local.py	76.00% <0.00%> (-4.00%)	⬇️
bentoml/_internal/utils/lazy_loader.py	76.47% <0.00%> (-2.95%)	⬇️
bentoml/_internal/models/model.py	83.44% <0.00%> (-1.99%)	⬇️
bentoml/_internal/runner/runner.py	83.63% <0.00%> (-1.82%)	⬇️