throw a message if tf runtime is incompatible

[njzjz]

fix #406, #447, #557, #774 and #796.

[codecov-commenter]

Codecov Report

Merging #797 (ac58443) into devel (4555034) will decrease coverage by 0.08%.
The diff coverage is 52.38%.

@@            Coverage Diff             @@
##            devel     #797      +/-   ##
==========================================
- Coverage   74.05%   73.96%   -0.09%     
==========================================
  Files          84       84              
  Lines        6576     6588      +12     
==========================================
+ Hits         4870     4873       +3     
- Misses       1706     1715       +9     

Impacted Files	Coverage Δ
deepmd/env.py	74.07% <52.38%> (-8.54%)	⬇️

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[amcadmus]

This PR checks the compile-time TF version with the run-time TF version, and raise a runtime error if the versions do not match.

However, sometimes in compatible compile-time and run-time TF versions are allowed, do I understand it correctly? If so, we should raise an warning message rather than an error.

[amcadmus]

I agree with most of the changes made by this PR, except one thing described below

This PR checks the compile-time TF version with the run-time TF version, and raise a runtime error if the versions do not match.

However, sometimes in compatible compile-time and run-time TF versions are allowed, do I understand it correctly? If so, we should raise an warning message rather than an error.

[amcadmus]

I agree with most of the changes made by this PR, except one thing described below

This PR checks the compile-time TF version with the run-time TF version, and raise a runtime error if the versions do not match.

However, sometimes in compatible compile-time and run-time TF versions are allowed, do I understand it correctly? If so, we should raise an warning message rather than an error.

outdated, please ignore this review