Add some new function for addons

[momomuchu]

1. Temporary directory management

2. Capturing stdout and stderr

3. Timing function execution

4. Asserting that a function raises a specific exception

[codecov]

Codecov Report

Patch coverage: 41.37% and project coverage change: -1.03 ⚠️

Comparison is base (2303143) 94.90% compared to head (3789e49) 93.88%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1440      +/-   ##
==========================================
- Coverage   94.90%   93.88%   -1.03%     
==========================================
  Files          44       44              
  Lines        7308     7337      +29     
==========================================
- Hits         6936     6888      -48     
- Misses        372      449      +77     

Impacted Files	Coverage Δ
joblib/testing.py	73.23% <41.37%> (-22.00%)	⬇️

... and 14 files with indirect coverage changes

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