move .conda to $SNK_HOME

[Wytamma]

Stop editable packages from being polluted with .conda folder by moving CONDA_PREFIX to $SNK_HOME/conda/<pipeline_name>

[Wytamma]

This doesn't work with package pipelines. $SNK_HOME/conda/<pipeline_name> doesn't exist if you install from pip. So conda/singularity envs wont be deleted when the package is uninstalled. For now I've move conda envs to .snakemake to prevent polluting editable workflows.

[Wytamma]

Probably need a check to see if workflow package as when you're developing the package workflow having conda in the package can cause issues i.e. building the package with conda env can break things because of files sizes

[Wytamma]

Only to to check if it's editable i.e. pip install . -e editable

[Wytamma]

might want to keep .snakemake when editable otherwise conda envs will be deleted