bus.send() fails with `No buffer space available` despite not reaching the timeout

### Describe the bug

When sending a lot of packets very quickly to a physical socketcan bus, `bus.send()` raises a `can.exceptions.CanOperationError: Failed to transmit: No buffer space available [Error Code 105]` despite the timeout not being reached.

### To Reproduce

Send 100 frames to a physical socketcan bus with `timeout=1.0` for each frame and no delay between sending the frames.

### Expected behavior

`can.send()` should retry transmission until buffer space is available or the timeout is exceeded.

### Additional context

OS and version: Ubuntu 24.04
Python version: 3.12.3
python-can version: 4.6.1
python-can interface/s (if applicable): `socketcan` (for a CANable 2.0 running CANnectivity)

Traceback and logs

```sh
$ ip -d link show pcan-e
12: pcan-e: mtu 16 qdisc pfifo_fast state UP mode DEFAULT group default qlen 10
link/can promiscuity 0 allmulti 0 minmtu 0 maxmtu 0
can state ERROR-ACTIVE restart-ms 0
bitrate 1024096 sample-point 0.746
tq 5 prop-seg 61 phase-seg1 62 phase-seg2 42 sjw 21 brp 1
gs_usb: tseg1 2..256 tseg2 2..128 sjw 1..128 brp 1..512 brp_inc 1
clock 170000000 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535 tso_max_size 65536 tso_max_segs 65535 gro_max_size 65536 parentbus usb parentdev 1-7.3:1.0
$ time python tests/cantest.py
Traceback (most recent call last):
File "/home/gos/gena-sidl/Integration-Tests/env/lib/python3.12/site-packages/can/interfaces/socketcan/socketcan.py", line 889, in _send_once
sent = self.socket.send(data)
^^^^^^^^^^^^^^^^^^^^^^
OSError: [Errno 105] No buffer space available

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/home/gos/gena-sidl/Integration-Tests/tests/cantest.py", line 12, in
bus.send(msg, timeout=1.0)
File "/home/gos/gena-sidl/Integration-Tests/env/lib/python3.12/site-packages/can/interfaces/socketcan/socketcan.py", line 874, in send
sent = self._send_once(data, channel)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gos/gena-sidl/Integration-Tests/env/lib/python3.12/site-packages/can/interfaces/socketcan/socketcan.py", line 891, in _send_once
raise can.CanOperationError(
can.exceptions.CanOperationError: Failed to transmit: No buffer space available [Error Code 105]
SocketcanBus was not properly shut down

real 0m0.112s
user 0m0.099s
sys 0m0.013s
```

with the following test script:

```python
#!/usr/bin/env python3

import can

N_PACKETS = 100

bus = can.Bus(interface="socketcan", channel="pcan-e")

data = bytes([0xAB] * 8)
for _ in range(N_PACKETS):
msg = can.Message(arbitration_id=1, is_extended_id=True, data=data)
bus.send(msg, timeout=1.0)

bus.shutdown()
```