E3-700: Add modified specification for new environment

This adds two new environment files:

• A full description of the latest e3 environment on the CSLab NFS share (which I take to be the same as TN)
• An abbreviated (one version per module) and modified (updated the versions listed according to https://confluence.esss.lu.se/display/E3/2021Q4+e3+release) according to the proposal here: https://confluence.esss.lu.se/display/E3/E3-655%3A+environment+schema#E3655:environmentschema-Discussion

These were both generated from a modified version of generate_spec.py. The only modification included here is that the original output for a module was:

  asyn:
    versions:
      - "7.0.5-3.4.1/4.41.0-6372ca2-20210426T180353"

but I propose replacing it with

  asyn:
  - ref: 7.0.5-3.4.1/4.41.0-6372ca2-20210426T180353

which makes it simpler to add additional fields which depend on the version.

Note that at the moment, the build-e3 tool has not been modified, and so these cannot be used to load a new specification. This would not be hard to fix, but it is somewhat out of scope of E3-700.