Required properties across allOfs don't work

[Edward-Upton]

What are the steps to reproduce this issue?

1. Generate an OpenAPI schema that has a component with optional properties, then try and set those properties as required in other item in an allOf, e.g:

components:
  schemas:
    ContractPartial:
      type: object
      properties:
        uuid:
          type: string
        description:
          type: string
        start_date:
          type: string
          format: date
        end_date:
          type: string
          format: date
    Contract:
      type: object
      allOf:
        - $ref: '#/components/schemas/ContractPartial'
        - type: object
          properties:
            active:
              type: boolean
              description: If this contract is current active.
          required:
            - description
            - end_date
            - start_date
            - uuid

2. Generate the Orval code, and these types will be like the following:

export type ContractPartial = {
  uuid?: string;
  description?: string;
  start_date?: string;
  end_date?: string;
}

export type ContractAllOf = {
  active: boolean;
};

export type Contract = ContractPartial & ContractAllOf;

What happens?

Notice that the outputted generated types do not specify that uuid, description, start_date and end_date should be required.

What were you expecting to happen?

Like other OpenAPI generators (e.g. oapi-codegen generate these types as required). In this case, it potentially would look something like:

type RequiredKeys<T, K extends keyof T> = Omit<T, K> & Required<Pick<T, K>>;

export type ContractPartial = {
  uuid?: string;
  description?: string;
  start_date?: string;
  end_date?: string;
}

export type ContractAllOf = {
  active: boolean;
};

export type Contract = RequiredKeys<ContractPartial & ContractAllOf, "uuid" | "description" | "start_date" | "end_date" | "area">;

## What versions are you using?

System:
OS: Linux 4.18 Rocky Linux 8.8 (Green Obsidian)
CPU: (4) x64 Intel(R) Xeon(R) Gold 6132 CPU @ 2.60GHz
Memory: 2.16 GB / 11.45 GB
Container: Yes
Shell: 3.6.1 - /usr/bin/fish
npmPackages:
axios: ^1.3.6 => 1.3.6
msw: ^2.2.0 => 2.2.0
orval: ^7.2.0 => 7.2.0