[REQ] [ruby] Reduce code duplication

[Fryguy]

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

The code generated under Ruby contains a significant amount of duplication. This duplication leads to code bloat both in file size and runtime memory usage.

I propose a base class for models, from which all models would inherit that would contain a lot of this shared logic.

@cliffano @zlx @autopp

Describe the solution you'd like

Initially, I'd like to introduce a new ApiModelBase class from which all base models would inherit. All models that have a parent would continue to inherit from their parent. In the initial PR introducing this new base model, I will move in all model methods that are static and that don't change per child class. This will set up the pattern after which follow up PRs can start moving other common methods and logic down to further eliminate duplication.

Describe alternatives you've considered

N/A

Additional context

I've started a PR to see how feasible it is, and I've created a draft PR in #22052.

I've also executed this against one of my gems and the file size dropped from 16MB to 12MB (25% reduction) even with only the small handful of common methods pulled out. See ManageIQ/kubevirt-sdk-ruby@master...Fryguy:kubevirt-sdk-ruby:reduce_gem_size

[Fryguy]

Opened this issue for discussion and direction. If everyone is good with it, then I can un-draft that PR.

[wing328]

sounds good to me

i tried to do the same thing a while ago but there was a requirement the model files should work independently as the use cases only generate models from the spec.

not sure if such requirement still makes sense and I'm happy to give your PR a try.

[Fryguy]

great thanks @wing328! - I'll finish up the PR and undraft it.