Add a test that ensure conservation of byte order during IPC

[fcharras]

This test shows that the current behavior regarding byteorder consistency in IPC is fine, and will also show that there's no regression in #1561 .

[codecov]

Codecov Report

Attention: Patch coverage is 92.30769% with 1 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (main@c2087db). Click here to learn what that means.

Files	Patch %	Lines
joblib/test/test_parallel.py	92.30%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1562   +/-   ##
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  Coverage        ?   95.15%           
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  Files           ?       44           
  Lines           ?     7596           
  Branches        ?        0           
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  Hits            ?     7228           
  Misses          ?      368           
  Partials        ?        0           

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[tomMoral]

LGTM