CLN deprecate bytes_limit from Memory

[tomMoral]

The parameter bytes_limit from Memory is misleading as it makes the user believe that this will be enforced automatically, whereas the user needs to call Memory.reduce_size to enforce this.
As this parameter can be directly passed to Memory.reduce_size, along with items_limit and age_limit since #1200, I propose to deprecate it from the Memory class.

[codecov]

Codecov Report

Patch coverage: 90.90% and project coverage change: +0.16 🎉

Comparison is base (d38b002) 94.59% compared to head (a710503) 94.75%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1447      +/-   ##
==========================================
+ Coverage   94.59%   94.75%   +0.16%     
==========================================
  Files          44       44              
  Lines        7361     7366       +5     
==========================================
+ Hits         6963     6980      +17     
+ Misses        398      386      -12     

Impacted Files	Coverage Δ
joblib/test/test_memory.py	98.42% <88.88%> (-0.13%)	⬇️
joblib/memory.py	95.18% <100.00%> (+0.02%)	⬆️

... and 1 file with indirect coverage changes

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