Resolve MyPy ignore comments for Cosmos pre-commit

[abhi12mohan]

The MyPy errors below have currently been resolved via ignore comments. We should ideally find solutions to these where we would be able to remove the ignore comments and not encounter any MyPy errors.

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• Cannot assign to a type:
  /init.py - file-wide

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• Resolve Operator subclass MyPy error:
  /oprerators/kubernetes.py - Line 27
  /operators/docker.py - Line 23

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• Resolve internal untyped decorators:
  /operators/local.py - Line 72, 86
  /operators/virtualenv.py - Line 56

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• No redef:
  /dataset.py - Line 11

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• Attr defined:
  /dbt/parser/project.py - Line 114

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• Has type:
  /operators/docker.py Line 42, 52
  /operators/kubernetes.py - Line 43

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• Operator:
  /operators/local.py - Line 48

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• Arg type:
  /dbt/graph.py - Line 134, 226