Improved integration of automatic python tests with conda builds

Description

This MR improves the integration of the automatic python tests test_python_imports.py and test_python_scripts.py with conda builds, where they should hopefully now discover things properly, and report the results better. This required a bit of restructuring, but nothing major.

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

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added infra_general lal lalburst lalframe lalinference lalinspiral lalmetaio lalpulsar lalsimulation lang_python + 1 deleted label

approved this merge request

@sebastian-khan, @vivien, @karl-wette, @david-keitel, please review this request. The changes to the relevant subpackages are only in the configuration of the automatic python import and --help tests.

LGTM - however, this kind of infrastructure coding is not my forte

approved this merge request

approved this merge request

approved this merge request

@john-veitch, @cjhaster, @vivien, please approve this.

approved this merge request

merged

mentioned in commit 9b639e49

mentioned in issue #283 (closed)

changed milestone to %lalsimulation-2.0.0

added pkg_general + 1 deleted label

added infra_autotools pkg_conda + 1 deleted label and removed infra_general lang_python pkg_general labels

added infra_gitlab label