Use intel-mkl-system feature to calc coverage

[termoshtt]

Use new container -> #323

Coverage job on master fails with link error
https://github.com/rust-ndarray/ndarray-linalg/runs/8094527572?check_suite_focus=true

This occurs with intel-mkl-static feature. This PR tries to use intel-mkl-system feature instead.

[termoshtt]

Container update is done in #323. This PR try to fix coverage job

[codecov]

Codecov Report

Merging #322 (3c184eb) into master (55866d9) will decrease coverage by 0.80%.
The diff coverage is 77.77%.

@@            Coverage Diff             @@
##           master     #322      +/-   ##
==========================================
- Coverage   90.71%   89.90%   -0.81%     
==========================================
  Files          71       71              
  Lines        3726     3756      +30     
==========================================
- Hits         3380     3377       -3     
- Misses        346      379      +33     

Impacted Files	Coverage Δ
lax/src/error.rs	83.33% <ø> (ø)
lax/src/tridiagonal.rs	78.02% <ø> (+0.84%)	⬆️
ndarray-linalg/src/svddc.rs	90.47% <ø> (ø)
ndarray-linalg/src/tridiagonal.rs	38.85% <20.00%> (+5.20%)	⬆️
ndarray-linalg/src/krylov/householder.rs	73.40% <100.00%> (ø)
ndarray-linalg/src/krylov/mgs.rs	91.89% <100.00%> (ø)
ndarray-linalg/src/layout.rs	90.62% <100.00%> (+5.33%)	⬆️
ndarray-linalg/src/least_squares.rs	96.15% <100.00%> (-2.72%)	⬇️
ndarray-linalg/src/lobpcg/lobpcg.rs	90.45% <100.00%> (-1.67%)	⬇️
ndarray-linalg/src/lobpcg/svd.rs	87.50% <100.00%> (+2.13%)	⬆️
... and 29 more

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