[Feature] Apply exclusión policity by groups

[rkmax]

It would be great if you could define a policy exclusion for group.

Example

# resource/serializer/Document.Foo.yml
MyBundle\Document\Foo:
  exclusion_policy: ALL
  exclusion_policy_groups:
      foo: ALL
      bar: NONE
  properties:
       property_a:
           expose: true
           policy_group: foo           
       property_b:
           exclude: false
           policy_group: bar

Example 2

# resource/serializer/Document.Foo.yml
MyBundle\Document\Foo:
  foo: # Group name
    exclusion_policy: ALL
    properties:
      property_a:
        expose: true
  bar: # Other group name          
    exclusion_policy: NONE
    properties:
      property_b:
        exclude: true

[goetas]

closing,
sorry for the incredibly long feedback loop. the feature you asked does not exists yet and conflicts with the current metadata structure.

if the suggestion is still valid, please motivate and I will re-open the ticket