Resort members of InterfaceInfo to avoid ABI break

[christophfroehlich]

#2997 (comment)

InterfaceInfo is only passed inside a std::vector (its size does not change when the object changes). But the memory layout of the struct changes and accessing it will break. By moving the new member at the end of the struct, this should not be a problem.

[saikishor]

Perfect. Thanks for the fix

Reference: https://cpp.sh/?source=%2F%2F+Example+program%0A%23include+%3Ciostream%3E%0A%23include+%3Cstring%3E%0A%23include+%3Cvector%3E%0A%0Astruct+Test%0A%7B%0A++++int+a%3B%0A++++int+b%3B%0A++++double+c%3B%0A++++std%3A%3Astring+s%3B%0A++++bool+d%3B%0A%7D%3B%0A%0Aint+main()%0A%7B%0A++std%3A%3Acout+%3C%3C+%22The+size+is+%3A++%22+%3C%3C+sizeof(Test)+%3C%3C+%22!%5Cn%22%3B%0A++std%3A%3Acout+%3C%3C+%22The+vector+size+is+%3A++%22+%3C%3C+sizeof(std%3A%3Avector%3CTest%3E)+%3C%3C+%22!%5Cn%22%3B%0A%7D

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.40%. Comparing base (44cbd9c) to head (d2a193b).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3001   +/-   ##
=======================================
  Coverage   89.40%   89.40%           
=======================================
  Files         157      157           
  Lines       18781    18781           
  Branches     1510     1510           
=======================================
  Hits        16791    16791           
  Misses       1369     1369           
  Partials      621      621           

Flag	Coverage Δ
unittests	89.40% <ø> (ø)

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Files with missing lines	Coverage Δ
...rface/include/hardware_interface/hardware_info.hpp	98.78% <ø> (ø)

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