[BUG] cpp-qt-client uses wrong header name for API key

Description

The C++ generator will insert "{{name}}" as the key in the addHeaders function of the API body. Consider https://github.com/OpenAPITools/openapi-generator/blob/777b7eeea064ab0ba22242ca2d47e93de0c2084c/modules/openapi-generator/src/main/resources/cpp-qt-client/api-body.mustache#L232

This will generate code similar to

void OAISomeApi::doSomething(...) {
    QString fullPath = QString(_serverConfigs["doSomething"][_serverIndices.value("doSomething")].URL()+"/someService/doSomething");
    
    if (_apiKeys.contains("OurAuth")) {
        addHeaders("OurAuth",_apiKeys.find("OurAuth").value());
    }

However, in this example "OurAuth" equals the name of the schema, not the value of the name field (cf. the example below).
In my understanding, and also considering how I understand the generated documentation, the addHeaders function look like

    if (_apiKeys.contains("OurAuth")) {
        addHeaders("api-key",_apiKeys.find("OurAuth").value());
    }

openapi-generator version

We are using the openAPI generator provided in the openapitools/openapi-generator-cli:v7.14.0 Docker image.

OpenAPI declaration file content or url

components:
  securitySchemes:
    OurAuth:
      type: apiKey
      in: header
      name: api-key
      description: Does something
#...

Generation Details

This is our config:

'!include': 'common.yml'
outputDir: /local/generated-rest-api/cpp/
generatorName: cpp-qt-client
additionalProperties:
    cppNamespace: SomeApi
    packageName: QtOpenAPIClient
    disallowAdditionalPropertiesIfNotPresent: false
    optionalProjectFile: false

Start with modules/openapi-generator/src/main/resources/cpp-qt-client/api-body.mustache at the referenced addHeaders code around line 232, then compare it with the provided OpenAPI securitySchemes example. Generate the cpp-qt-client output and verify that the API-key lookup still uses the schema key while the emitted header uses the security scheme's name field.