HID: Use bpf_wq_set_callback kernel function

HID: Use bpf_wq_set_callback kernel function

Remove extern declaration of bpf_wq_set_callback_impl() from
hid_bpf_helpers.h and replace bpf_wq_set_callback macro with a
corresponding new declaration.

Tested with:
  # append tools/testing/selftests/hid/config and build the kernel
  $ make -C tools/testing/selftests/hid
  # in built kernel
  $ ./tools/testing/selftests/hid/hid_bpf -t test_multiply_events_wq

  TAP version 13
  1..1
  # Starting 1 tests from 1 test cases.
  #  RUN           hid_bpf.test_multiply_events_wq ...
  [    2.575520] hid-generic 0003:0001:0A36.0001: hidraw0: USB HID v0.00 Device [test-uhid-device-138] on 138
  #            OK  hid_bpf.test_multiply_events_wq
  ok 1 hid_bpf.test_multiply_events_wq
  # PASSED: 1 / 1 tests passed.
  # Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0
  PASS

Acked-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20260120222638.3976562-9-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>