Remove the dirty hack

[eclipse95]

Hi,
I see that there is a "dirty hack" in the Dockerfile.
I see that your module uses C++17 and OTB doesn't fully support it.
This PR set C++ 17 only for your module in CMakefile. So, it removed the dirty hack in the Dockerfile.

I have also added Python dependencies in the setup.py.
I have split the PR in 3 distinct commits if you prefer cherry-pick it.

[remicres]

Thanks a lot @eclipse95 !
I'll check how the CI behaves with the proposed changes this week

[remicres]

Unfortunately the CI does not pass at the docker build stage.

Did you succeed to build the docker image with the proposed changes? If yes, could you provide the ARGs used? (OTB version, etc)

Thanks

[eclipse95]

Hi,
OK, I didn't check in the same context. I built Debian packages OTB+OTBTF (to use it on Colab). I take OTB from Debian upstream repository (OTB version 8.1.2). I didn't use "super build", but the default used by Debian with some tweaks, so some features (such as OTB_USE_6S) are not built.

I will check with the Dockerfile provided in the repository.