drivers: wifi: eswifi: Fix err log & NET_SOCKETS_OFFLOAD=n config

Change Highlights:

- Fix error check after `k_work_reschedule_for_queue`. A value of 1
  means job was scheduled which was resulting in a ton of "<err>
  wifi_eswifi: Rescheduling socket read error" logs getting printed
  due to the erroneous check
- When using the B-L475E-IOT01A, attempts to use a TLS socket result
  in a hang when socket offload is enabled so I'd like to have a way
  to disable the option. To accomplish this, I I switched the
  `CONFIG_NET_SOCKETS_OFFLOAD=n` Kconfig option from `select` to
  `imply`.
- There was a missing `net_context_set_state()` call when
  `CONFIG_NET_SOCKETS_OFFLOAD=n`. I applied the same fix from #30664
  for this case to fix the issue.

Signed-off-by: Chris Coleman <chris@memfault.com>