Remove deprecated ModuleCdc amino encoding from name module

[iramiller]

Summary of Bug

The name module is currently using ModuleCdc (Amino) encoding for storage in the KV store. This use is deprecated in favor of the Binary Marshaller (proto) format.

Mitigation

• Refactor Marshall/Unmarshall methods to use the cdc binary encoder

x/name/keeper/keeper.go:
   90  	}
   91: 	bz, err := types.ModuleCdc.MarshalBinaryBare(&record)
   92  	if err != nil {

  117  	record = &types.NameRecord{}
  118: 	err = types.ModuleCdc.UnmarshalBinaryBare(bz, record)
  119  	return record, err

  193  		record := types.NameRecord{}
  194: 		if err := types.ModuleCdc.UnmarshalBinaryBare(iterator.Value(), &record); err != nil {
  195  			return err

• Create a migration function that extracts any existing name records encoded in amino and reloads them using proto encoding.

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For Admin Use

• Not duplicate issue
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