Add new format keyword global-unique

[ajbalogh]

Is your feature request related to a use case? Please describe.

• Users currently have to add a unique name for every object that has a property documented as being globally unique.

  properties:
    name:
      description: >-
        Globally unique name of an object.
        It also serves as the primary key for arrays of objects.
      type: string
      pattern: ^[\sa-zA-Z0-9-_()><\[\]]+$

  p1, p2 = config.ports.port(name='p1').port(name='p2')
  
  c1 = config.capture.capture(name='c1')
  c1.port_names = [p1.name]

Describe the solution you'd like

# if the user does not specify a name,  one will be generated for them
p1, p2 = config.ports.port().port()
print(p1, p2) # outputs PORT-1 PORT-2

• Instead of implicit descriptions there should be an explicit string format keyword named global-unique that is documented in the modeling guide
• The keyword MUST be supported by the python/go ux sdk generators which will generate a unique name if none is provided.
• The python/go ux sdk generators should generate a named based on the schema object that contains the property, the format of the name MUST be <schema object in uppercase>-<next available int>.

  # python/go sdk generation should produce a default name <schema object name in upper case>-<next available int>
  # i.e., name: PORT-1
  Port:
    type: object
    properties:
      name:
      type: string
      format: global-unique
      pattern: ^[\sa-zA-Z0-9-_()><\[\]]+$    

• Validation that is part of the python/go ux sdk packages MUST enforce the keyword by ensuring that all properties with a format of global-unique are globally unique.

  properties:
    name:
      description: >-
        Globally unique name of an object.
        It also serves as the primary key for arrays of objects.
      type: string
      format: global-unique
      pattern: ^[\sa-zA-Z0-9-_()><\[\]]+$

Describe alternatives you've considered

The current OpenApi specificiation does not provide any format for indicating a globally unique name.

Additional context

N/A