Add environment's bin to path

[frobnitzem]

Since conda can install binaries (like R) into the environment's bin, that bin directory should be added to PATH in the module.

In the current version, I see:

module show conda-env/analysis-py3.9.12
----------------------------------------------------------------------------
   $proj/modules/conda-env/analysis-py3.9.12.lua:
----------------------------------------------------------------------------
prepend_path("PATH","$proj/anaconda3/bin")
set_shell_function("pip","eval $proj/envs/analysis/bin/pip "$@"","eval $proj/envs/analysis/bin/pip $*")
set_shell_function("pip3","eval $proj/envs/analysis/bin/pip "$@"","eval $proj/envs/analysis/bin/pip $*")
pushenv("CONDA_PREFIX","$proj/envs/analysis")
pushenv("CONDA_DEFAULT_ENV","$proj/envs/analysis")
prepend_path("LD_LIBRARY_PATH","$proj/envs/analysis/lib")
prepend_path("PYTHONPATH","$proj/envs/analysis/lib/python3.9/site-packages")
pushenv("PYTHONNOUSERSITE","1")

[amaji]

This is also one of those default choices. By default, conda-env-mod tries to use the Python from base anaconda. This is to ensure that users can use existing packages like numpy, matplotlib etc. without having to reinstall everything.

You can override the default using the switch --local-python when using conda-env-mod. In this case, the modulefile will add the environment's bin to PATH.

I've heard feedback from other users who also want the default to be --local-python, so we'll implement that with the next round of commits.