[python-experimental] adds missing bases, performance improvements (!11517) · Merge requests · OpenAPI Tools / openapi-generator

Created by: spacether

adds missing bases: Int32Base, Int64Base, Float32Base, Float64Base
Improves performance by calling cls._get_new_instance_without_conversion rather than _from_openapi_data (which runs validation again)
other small performance improvments

Performance improvements investigated per https://github.com/OpenAPITools/openapi-generator/issues/11496 and comments in that issue show them reducing deserialization tome when ingesting very large responses ~13.8 mB

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