Add clamp operator

[stever178]

pytest output:

=============================== test session starts ================================
platform linux -- Python 3.12.5, pytest-8.3.5, pluggy-1.5.0
rootdir: /home/lsj/projects/ntops
configfile: pyproject.toml
plugins: cov-6.1.1
collected 102 items

tests/test_abs.py ........                                                   [  7%]
tests/test_add.py ........                                                   [ 15%]
tests/test_addmm.py ..                                                       [ 17%]
tests/test_bmm.py ..                                                         [ 19%]
tests/test_clamp.py ........                                                 [ 27%]
tests/test_cos.py ........                                                   [ 35%]
tests/test_div.py ........                                                   [ 43%]
tests/test_exp.py ........                                                   [ 50%]
tests/test_gelu.py ........                                                  [ 58%]
tests/test_mm.py ..                                                          [ 60%]
tests/test_mul.py ........                                                   [ 68%]
tests/test_relu.py ........                                                  [ 76%]
tests/test_rsqrt.py ........                                                 [ 84%]
tests/test_sigmoid.py ........                                               [ 92%]
tests/test_sin.py ........                                                   [100%]

========================== 102 passed in 94.81s (0:01:34) ==========================

[voltjia]

pytest output:

============================= test session starts ==============================
platform linux -- Python 3.10.12, pytest-8.3.3, pluggy-1.5.0
rootdir: /home/huangjiacheng/ntops
configfile: pyproject.toml
plugins: cov-6.0.0
collected 238 items

tests/test_abs.py ........                                               [  3%]
tests/test_add.py ........                                               [  6%]
tests/test_addmm.py ..                                                   [  7%]
tests/test_bitwise_and.py ................                               [ 14%]
tests/test_bitwise_not.py ................                               [ 21%]
tests/test_bitwise_or.py ................                                [ 27%]
tests/test_bmm.py ..                                                     [ 28%]
tests/test_clamp.py ........                                             [ 31%]
tests/test_cos.py ........                                               [ 35%]
tests/test_div.py ........                                               [ 38%]
tests/test_eq.py ........                                                [ 42%]
tests/test_exp.py ........                                               [ 45%]
tests/test_ge.py ........                                                [ 48%]
tests/test_gelu.py ........                                              [ 52%]
tests/test_gt.py ........                                                [ 55%]
tests/test_isinf.py ........                                             [ 58%]
tests/test_isnan.py ........                                             [ 62%]
tests/test_le.py ........                                                [ 65%]
tests/test_lt.py ........                                                [ 68%]
tests/test_mm.py ..                                                      [ 69%]
tests/test_mul.py ........                                               [ 73%]
tests/test_ne.py ........                                                [ 76%]
tests/test_neg.py ........                                               [ 79%]
tests/test_relu.py ........                                              [ 83%]
tests/test_rsqrt.py ........                                             [ 86%]
tests/test_sigmoid.py ........                                           [ 89%]
tests/test_sin.py ........                                               [ 93%]
tests/test_softmax.py ........                                           [ 96%]
tests/test_tanh.py ........                                              [100%]

======================= 238 passed in 675.32s (0:11:15) ========================