Only run conda builds for all python versions nightly
Description
This MR modifies the CI config to only run conda builds for all python versions on the nightly (or manually triggered) builds, but for normal pushes just run the most advanced version in the conda configuration.
EDIT: this MR now includes a number of backports of the conda-forge conda recipes for lalsuite into this repo.
API Changes and Justification
Backwards Compatible Changes
- This change introduces no API changes
- This change adds new API calls
Backwards Incompatible Changes
- This change modifies an existing API
- This change removes an existing API
If any of the Backwards Incompatible check boxes are ticked please provide a justification why this change is necessary and why it needs to be done in a backwards incompatible way.
Review Status
Please provide details on any reviews related to this change and and the associated reviewers.