[BUG] DefautCodegen warning when using typescript-angular generator (The value (generator's option) must be either boolean or string)

The warning below is displayed when using typescript-angular generator:

[main] WARN o.o.codegen.DefaultCodegen - The value (generator's option) must be either boolean or string. Default to false.

openapi-generator version

At least 7.1.0 and 7.2.0

Steps to reproduce

npx @openapitools/openapi-generator-cli generate -i api.json -o outdir -g typescript-angular

will display the warning below, with any OpenAPI input (see below):

[main] WARN o.o.codegen.DefaultCodegen - The value (generator's option) must be either boolean or string. Default to false.

Works without warning with other generators (say 'java': npx @openapitools/openapi-generator-cli generate -i api.json -o outdir -g java )

(An example api.json to reproduce, taken from https://support.smartbear.com/swaggerhub/docs/en/get-started/openapi-3-0-tutorial.html

openapi: 3.0.0
info:
  version: 1.0.0
  title: Simple Artist API
  description: A simple API to illustrate OpenAPI concepts

servers:
  - url: https://example.io/v1

# Basic authentication
components:
  securitySchemes:
    BasicAuth:
      type: http
      scheme: basic
security:
  - BasicAuth: []

paths: {}

)

Related issues/PRs

Other generators seem to have similar warnings. See https://github.com/OpenAPITools/openapi-generator/issues/9008

Start by running the reported npx @openapitools/openapi-generator-cli command with the supplied OpenAPI example and the typescript-angular generator. Trace the [main] WARN from DefaultCodegen and compare it with the java generator; done means the typescript-angular generation completes without this warning for the reproduced input.