[REQ][Ruby] Override header params by passing options from client

Is your feature request related to a problem? Please describe.

I want to pass header AUTHORIZATION token and Accept per request by passing it as an option from the generated client. Here is an example in ruby

api_client = DefaultApiClient.new
api_client.get_pet(pet_id: 'abc', header_params: {'Authorization' => 'Bearer', 'Accept' => 'text/html'})

Describe the solution you'd like

If I pass any header params from client it should not be overridden.
Update the template before this line so

next unless header_params[auth_setting[:key]].to_s.strip.empty?

https://github.com/OpenAPITools/openapi-generator/blob/2ba0e0362970764a5f81607d3637e862cd6e39e9/samples/client/petstore/ruby/lib/petstore/api_client.rb#L307-L312

Describe alternatives you've considered

Two things that we can do now as an alternative but none of them are ideal

1. Override auth_settings method on config object.
2. Pass option debug_auth_names from client.

Start with the linked samples/client/petstore/ruby/lib/petstore/api_client.rb lines 307-312, then locate the generator template that produces this section. Check how per-request header_params are handled around the auth-setting condition, and verify that generated Ruby clients preserve explicitly supplied Authorization and Accept headers.