Tolerate channel creation error in lisafs.
Tolerate channel creation error in lisafs.

We might get a cranky server which does not want to allocate too many channels.
On server, the number of channels allowed is controlled by GOMAXPROCS and might
vary from 2 to 4.

Updates #6313

PiperOrigin-RevId: 433023166

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor