[BUG] openapiGeneratorIgnoreList is missing from schema

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Please differentiate the bug

This repository is not responsible for the actual code generation. If you have problems with the code generation, please open the bug at OpenAPITools/openapi-generator.

Please also check if the bug is already known before you open a new bug.

🐛 Bug Report:

Describe the bug

The "openapiGeneratorIgnoreList" option is missing within the JSON schema, even though specifying it does work.

Steps to Reproduce

Steps to reproduce the behavior:

1. Add "openapiGeneratorIgnoreList" option to a generator
2. Notice schema validation fails
3. Execute generator
4. See "openapiGeneratorIgnoreList" being used as expected

Expected behavior

Schema includes definition for openapiGeneratorIgnoreList property.

Screenshots

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Operation System (please complete the following information):

• OS: [e.g. Ubuntu ]
• Version [e.g. 22]

Package System (please complete the following information):

• Version [e.g. 22]

Additional context

Slightly unrelated but allowing an array within the JSON would be a nice addition.