convert tabulate data from np.ndarray to tf.Tensor

[njzjz]

A tensor can be reused in a graph but a numpy array can't. This avoids saving duplicated constants in the case #1423.

[codecov-commenter]

Codecov Report

Merging #1657 (95a7668) into devel (de7ba72) will decrease coverage by 11.86%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##            devel    #1657       +/-   ##
===========================================
- Coverage   76.15%   64.28%   -11.87%     
===========================================
  Files          94        5       -89     
  Lines        7850       14     -7836     
===========================================
- Hits         5978        9     -5969     
+ Misses       1872        5     -1867     

Impacted Files	Coverage Δ
deepmd/utils/tabulate.py
deepmd/descriptor/se_t.py
source/op/_gelu.py
source/op/_soft_min_virial_grad.py
deepmd/utils/compat.py
deepmd/utils/data.py
deepmd/infer/deep_pot.py
deepmd/descriptor/se.py
deepmd/entrypoints/transfer.py
deepmd/loss/ener.py
... and 79 more

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