Change the `absl::StatusCode` from `kDataLoss` to `kInvalidArgument` for failed CSV parsing.
Change the `absl::StatusCode` from `kDataLoss` to `kInvalidArgument` for failed
CSV parsing.

`kDataLossError` is meant for cases where data previously stored turned out to
be lost after all. `kInvalidArgument` is a better match if incoming data do not
have the correct format.

PiperOrigin-RevId: 382460519

google/riegeli,google/riegeli,google/riegeli,google/riegeli