Rename fields to avoid name clash in Fiddle migration.  (Field has same name as a field in nested HParams class.)
Rename fields to avoid name clash in Fiddle migration.  (Field has same name as a field in nested HParams class.)

MockLM.logits -> MockLM._logits
MockTeacherLM.vocab_size -> MockTeacherLM._vocab_size
ApplyAttention.position_emb_add -> ApplyAttention._position_emb_add
IdEncoderLayer.model_dims -> IdEncoderLayer._model_dims

PiperOrigin-RevId: 482825487

google/praxis,google/praxis