Enable type checks for nethsm code

[nponsard]

Transferred from Nitrokey/pynitrokey#442 :

The updated NetHSM API client includes type annotations so we should be able to remove this exception:

nethsm-sdk-py/pyproject.toml

Lines 50 to 53 in 47cec17

	[[tool.mypy.overrides]]
	module = "nethsm.client.*"
	ignore_errors = true

And maybe also add the module to the strict checks:

[[tool.mypy.overrides]] 
module = [ 
 "nethsm.client.*",
]
disallow_untyped_defs = true 

A quick test causes a few error messages though:

pynitrokey/nethsm/client/paths/keys_generate/post/responses/response_201/__init__.py:19: error: Attributes without a default cannot follow attributes with one  [misc]
pynitrokey/nethsm/client/paths/keys/post/responses/response_201/__init__.py:19: error: Attributes without a default cannot follow attributes with one  [misc]
pynitrokey/nethsm/client/components/schema/public_key.py:78: error: Incompatible types in assignment (expression has type "str", variable has type "Union[Mapping[str, Union[dict[Any, Any], immutabledict[Any, Any], Mapping[str, object], list[Any], tuple[Any, ...], float, int, str, date, datetime, UUID, bool, None, bytes, io.FileIO, BufferedReader, pynitrokey.nethsm.client.schemas.schema.FileIO]], KeyPublicDataDict, Unset]")  [assignment]
pynitrokey/nethsm/client/components/schema/public_key.py:83: error: Invalid index type "Union[Mapping[str, Union[dict[Any, Any], immutabledict[Any, Any], Mapping[str, object], list[Any], tuple[Any, ...], float, int, str, date, datetime, UUID, bool, None, bytes, io.FileIO, BufferedReader, pynitrokey.nethsm.client.schemas.schema.FileIO]], KeyPublicDataDict, Unset]" for "dict[str, Any]"; expected type "str"  [index]
pynitrokey/nethsm/client/components/schema/private_key.py:73: error: Incompatible types in assignment (expression has type "str", variable has type "Union[Mapping[str, Union[dict[Any, Any], immutabledict[Any, Any], Mapping[str, object], list[Any], tuple[Any, ...], float, int, str, date, datetime, UUID, bool, None, bytes, io.FileIO, BufferedReader, pynitrokey.nethsm.client.schemas.schema.FileIO]], KeyPrivateDataDict]")  [assignment]
pynitrokey/nethsm/client/components/schema/private_key.py:78: error: Invalid index type "Union[Mapping[str, Union[dict[Any, Any], immutabledict[Any, Any], Mapping[str, object], list[Any], tuple[Any, ...], float, int, str, date, datetime, UUID, bool, None, bytes, io.FileIO, BufferedReader, pynitrokey.nethsm.client.schemas.schema.FileIO]], KeyPrivateDataDict]" for "dict[str, Any]"; expected type "str"  [index]

And the generated code still has many untyped defs.

Issue created on the generator repo : openapi-json-schema-tools/openapi-json-schema-generator#246