BF: make reversible

See merge request fsl/conda/manifest-rules!69

BF: Don't update base packages

See merge request fsl/conda/manifest-rules!68

BF: dict not tuple, wrong var names

See merge request fsl/conda/manifest-rules!67

BF: Simplify update_release_file - was not updating platform-specific packages.

See merge request fsl/conda/manifest-rules!66

BF: wrong paths being written

See merge request fsl/conda/manifest-rules!65

ENH: update update-all-packages job to consider externally hosted packages

See merge request fsl/conda/manifest-rules!64

released, which is not what we want

fsl-release.yml. Couple of other bug fixes

RF: SKIP_CREATE_ENV skips creating conda env

See merge request fsl/conda/manifest-rules!63

manifest-rules, and sets PYTHONPATH

BF: need newlines

See merge request fsl/conda/manifest-rules!62

ENH: Generate index of development release manifests

See merge request fsl/conda/manifest-rules!61

can query them

Manifest file naming logic wrong way around

See merge request fsl/conda/manifest-rules!60

direct log to a uniquely named file

RF: Simplify pipeline.

See merge request fsl/conda/manifest-rules!59

on tags, a release manifest is generated, and on commits a dev
manifest. Single deploy job, which deploys both manifest and env files

RF: No longer generate environment files for separate CUDA versions.

See merge request fsl/conda/manifest-rules!58

packages are to be added to linux-64 environment.