Supporting of one separate 'required' option for query parameters

[Morgunov-Vitaly]

Hi!
For example, there are several paths that include similar parameters, but with different required options: in some paths parameters are required, in others they are optional.

If we can specify the required option separately, we can reuse parameter descriptions. Like this:

/api/v1/rootname:
    get:
      summary: 'Path example'
      parameters:
        - $ref: '#/components/parameters/queryFiltersDateFrom'
        - $ref: '#/components/parameters/queryFiltersDateTo'
        - $ref: '#/components/parameters/queryGroups'
        - $ref: '#/components/parameters/queryOrderByColumn'
        - $ref: '#/components/parameters/queryOrderByDirection'
      required:
        - 'filters[date_from]'
        - 'filters[date_to]'
        - 'groups'
        - 'order_by_column'
        - 'order_by_direction'

[hkosova]

Related (or duplicate): #2026