selftests/bpf: Rename ARG_PTR_TO_LONG test description

selftests/bpf: Rename ARG_PTR_TO_LONG test description

Given we got rid of ARG_PTR_TO_LONG, change the test case description to
avoid potential confusion:

  # ./vmtest.sh -- ./test_progs -t verifier_int_ptr
  [...]
  ./test_progs -t verifier_int_ptr
  [    1.610563] bpf_testmod: loading out-of-tree module taints kernel.
  [    1.611049] bpf_testmod: module verification failed: signature and/or required key missing - tainting kernel
  #489/1   verifier_int_ptr/arg pointer to long uninitialized:OK
  #489/2   verifier_int_ptr/arg pointer to long half-uninitialized:OK
  #489/3   verifier_int_ptr/arg pointer to long misaligned:OK
  #489/4   verifier_int_ptr/arg pointer to long size < sizeof(long):OK
  #489/5   verifier_int_ptr/arg pointer to long initialized:OK
  #489     verifier_int_ptr:OK
  Summary: 1/5 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20240913191754.13290-7-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>