[Transmissions] Add force interface (backport #2588)

[mergify]

Follow up on #2310.

Same concept and approach, only this time we add force and current interfaces.

As before, adding these two new interfaces is backwards compatible. If force and current interfaces are not available then the contents from this PR do nothing.

---

This is an automatic backport of pull request #2588 done by Mergify.

[mergify]

Cherry-pick of b674ebb has failed:

On branch mergify/bp/kilted/pr-2588
Your branch is up to date with 'origin/kilted'.

You are currently cherry-picking commit b674ebb.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
	modified:   transmission_interface/include/transmission_interface/differential_transmission.hpp
	modified:   transmission_interface/include/transmission_interface/simple_transmission.hpp
	modified:   transmission_interface/test/differential_transmission_test.cpp
	modified:   transmission_interface/test/simple_transmission_test.cpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   doc/release_notes.rst

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[codecov]

Codecov Report

❌ Patch coverage is 86.15385% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.37%. Comparing base (c527e76) to head (3378379).
⚠️ Report is 2 commits behind head on kilted.

Files with missing lines	Patch %	Lines
...ansmission_interface/differential_transmission.hpp	76.19%	3 Missing and 2 partials ⚠️
...ude/transmission_interface/simple_transmission.hpp	55.55%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           kilted    #2679      +/-   ##
==========================================
- Coverage   89.38%   89.37%   -0.01%     
==========================================
  Files         151      151              
  Lines       17036    17096      +60     
  Branches     1420     1424       +4     
==========================================
+ Hits        15227    15279      +52     
- Misses       1256     1259       +3     
- Partials      553      558       +5     

Flag	Coverage Δ
unittests	89.37% <86.15%> (-0.01%)	⬇️

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

Files with missing lines	Coverage Δ
..._interface/test/differential_transmission_test.cpp	99.57% <100.00%> (+0.05%)	⬆️
...ission_interface/test/simple_transmission_test.cpp	100.00% <100.00%> (ø)
...ude/transmission_interface/simple_transmission.hpp	76.38% <55.55%> (-0.89%)	⬇️
...ansmission_interface/differential_transmission.hpp	79.75% <76.19%> (-0.81%)	⬇️

... and 1 file with indirect coverage changes

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[christophfroehlich]

@saikishor do we want to break ABI on kilted here?

[saikishor]

@saikishor do we want to break ABI on kilted here?

Yes, as this is a runtime plugin and also it doesn't have any dependencies using the library. So, shouldn't be a problem at all

[christophfroehlich]

Ah sure, I forgot that they are plugins at well.