Give conda environments a name

[edmundmiller]

          > Not seen [this error](https://github.com/nf-core/modules/actions/runs/6635360127/job/18030179941?pr=4225) before:

java.nio.channels.OverlappingFileLockException
is that related to the conda environment change?

I see this error appears when running tests for subworkflows. Could be that we need to add a name to environment.yml? If two modules in a subworkflow have exactly the same environment.yml I suspect the environment names may clash

Originally posted by @mirpedrol in #4225 (comment)

[edmundmiller]

We need to decide how we're going to name them.

There's a few with a name already:

name: nf-core-vep-108.2
name: nf-core-snpeff-5.1

However, I'd vote we just keep it in line with the name field in the meta.yml. Easy to lint, no /'s or extra nf-core separators.

[mashehu]

Same as meta.yml sounds good.