Add deprecations to old methods not using Structs

[saikishor]

This PR adds deprecations to the old methods

[codecov]

Codecov Report

Attention: Patch coverage is 90.25974% with 15 lines in your changes missing coverage. Please review.

Project coverage is 88.85%. Comparing base (2e82c40) to head (b9765fe).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
...rface_testing/test/test_components/test_sensor.cpp	25.00%	2 Missing and 1 partial ⚠️
...rface_testing/test/test_components/test_system.cpp	25.00%	2 Missing and 1 partial ⚠️
...hardware_components/test_single_joint_actuator.cpp	0.00%	2 Missing ⚠️
...e_interface/src/mock_components/generic_system.cpp	75.00%	0 Missing and 1 partial ⚠️
...t_hardware_components/test_force_torque_sensor.cpp	50.00%	0 Missing and 1 partial ⚠️
.../test/test_hardware_components/test_imu_sensor.cpp	50.00%	0 Missing and 1 partial ⚠️
...ware_components/test_system_with_command_modes.cpp	50.00%	0 Missing and 1 partial ⚠️
...test_hardware_components/test_two_joint_system.cpp	50.00%	0 Missing and 1 partial ⚠️
...ace_testing/test/test_components/test_actuator.cpp	75.00%	0 Missing and 1 partial ⚠️
..._components/test_actuator_exclusive_interfaces.cpp	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2344      +/-   ##
==========================================
- Coverage   88.99%   88.85%   -0.14%     
==========================================
  Files         148      148              
  Lines       16805    16891      +86     
  Branches     1438     1438              
==========================================
+ Hits        14955    15009      +54     
- Misses       1287     1317      +30     
- Partials      563      565       +2     

Flag	Coverage Δ
unittests	88.85% <90.25%> (-0.14%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
..._interface/include/hardware_interface/actuator.hpp	100.00% <ø> (ø)
.../include/hardware_interface/actuator_interface.hpp	91.30% <100.00%> (ø)
...re_interface/include/hardware_interface/sensor.hpp	100.00% <ø> (ø)
...ce/include/hardware_interface/sensor_interface.hpp	85.98% <100.00%> (ø)
...re_interface/include/hardware_interface/system.hpp	100.00% <ø> (ø)
...ce/include/hardware_interface/system_interface.hpp	84.80% <100.00%> (ø)
...terface/include/mock_components/generic_system.hpp	100.00% <ø> (ø)
hardware_interface/src/actuator.cpp	76.53% <ø> (-4.09%)	⬇️
hardware_interface/src/sensor.cpp	72.43% <ø> (-5.13%)	⬇️
hardware_interface/src/system.cpp	76.92% <ø> (-4.11%)	⬇️
... and 13 more

... and 1 file with indirect coverage changes

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[soham2560]

minor changes. on a side note, should the template function for initialize_hardware in RM also have deprecation warning

[saikishor]

minor changes. on a side note, should the template function for initialize_hardware in RM also have deprecation warning

I'll open another PR for the cleanup. The scope of this PR is only upto deprecations

[soham2560]

just that one file remaining, rest LGTM

[soham2560]

LGTM