In `CsvReader`, if `src` fails after a CR, do not propagate the failure yet. The last record was correctly terminated, no matter whether a LF would follow.
In `CsvReader`, if `src` fails after a CR, do not propagate the failure yet.
The last record was correctly terminated, no matter whether a LF would follow.

PiperOrigin-RevId: 355598126

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