[PropertyName("name", Ignore=true)] ignore not honoured.

[russcam]

Relates: https://stackoverflow.com/questions/58157898/c-sharp-elasticsearch-nest-v7-x-ignore-true-not-working-on-fields

As part of the refactoring of serialization in 7.x, the Ignore property introduced on PropertyNameAttribute is not honoured. This should be fixed. This property was introduced as part of IJsonProperty that unifies property serialization mapping across attributes and types.