[PidROS] Change args to const reference (backport #513)

[mergify]

Change the constructor args to const ref instead of a copy

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This is an automatic backport of pull request #513 done by Mergify.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.22%. Comparing base (727444e) to head (c25738f).

Additional details and impacted files

@@           Coverage Diff           @@
##            jazzy     #514   +/-   ##
=======================================
  Coverage   78.22%   78.22%           
=======================================
  Files          28       28           
  Lines        2191     2191           
  Branches      129      129           
=======================================
  Hits         1714     1714           
  Misses        404      404           
  Partials       73       73           

Flag	Coverage Δ
unittests	78.22% <ø> (ø)

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Files with missing lines	Coverage Δ
...ontrol_toolbox/include/control_toolbox/pid_ros.hpp	100.00% <ø> (ø)

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