add svd_truncate mindim capability

[jeffry1829]

To solve #410

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 6.66667% with 14 lines in your changes are missing coverage. Please review.

Project coverage is 16.45%. Comparing base (85f7a87) to head (0b3e89b). Report is 1 commits behind head on dev-master.

Files	Patch %	Lines
src/linalg/Gesvd_truncate.cpp	0.00%	2 Missing and 3 partials :warning:
src/linalg/Svd_truncate.cpp	16.66%	1 Missing and 4 partials :warning:
...c/backend/linalg_internal_cpu/memcpyTruncation.cpp	0.00%	3 Missing and 1 partial :warning:

Additional details and impacted files

@@              Coverage Diff               @@
##           dev-master     #417      +/-   ##
==============================================
- Coverage       17.73%   16.45%   -1.29%     
==============================================
  Files             220      220              
  Lines           48965    48095     -870     
  Branches        20113    20012     -101     
==============================================
- Hits             8686     7914     -772     
+ Misses          36075    36058      -17     
+ Partials         4204     4123      -81     

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