sagemathgh-37099: GH Actions: Build platform-independent wheels of sagemath-environment, sage-setup, sage-sws2rst for PyPI
    
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We already build platform wheels for
**sagemath-{objects,categories,repl}** for PyPI using cibuildwheel.
Here we add building of platform-independent wheels for **sagemath-
environment** and **sage-setup** and **sage-sws2rst** to the GH Actions
workflow. (They are needed, for example, for pyodide / jupyterlite.)

To test locally: `make pypi-noarch-wheels`

We also update actions/upload-artifact, actions/download-artifact to v4.
This requires a restructuring, as we can no longer upload the wheels for
different architectures (built by separate matrix jobs) to the same
artifact: https://github.com/actions/upload-artifact?tab=readme-ov-
file#not-uploading-to-the-same-artifact
Instead we upload them as separate artifacts and deploy them to PyPI
directly from the job that built them.

This is:
- part of sagemath#31251

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URL: sagemath#37099
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee, Matthias Köppe

sagemathgh-37762: `dist.yml`: Download optional/experimental tarballs for GitHub Release assets
    
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description below. -->
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to calculate 1 + 2". -->
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- Fixes sagemath#37752, at least for the non-"huge" tarballs (we skip the "huge"
tarballs here).
- More options for `sage -package download` (a subset of what `sage
-package list` supports)
- Also remove some zombie package files

Test run: https://github.com/mkoeppe/sage/actions/workflows/dist.yml

### 📝 Checklist

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### ⌛ Dependencies

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- Depends on sagemath#37099 (merged to resolve merge conflict)
    
URL: sagemath#37762
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee, Matthias Köppe

sagemathgh-37762: `dist.yml`: Download optional/experimental tarballs for GitHub Release assets
    
<!-- ^ Please provide a concise and informative title. -->
<!-- ^ Don't put issue numbers in the title, do this in the PR
description below. -->
<!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method
to calculate 1 + 2". -->
<!-- v Describe your changes below in detail. -->
<!-- v Why is this change required? What problem does it solve? -->
<!-- v If this PR resolves an open issue, please link to it here. For
example, "Fixes sagemath#12345". -->

- Fixes sagemath#37752, at least for the non-"huge" tarballs (we skip the "huge"
tarballs here).
- More options for `sage -package download` (a subset of what `sage
-package list` supports)
- Also remove some zombie package files

Test run: https://github.com/mkoeppe/sage/actions/workflows/dist.yml

### 📝 Checklist

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- [x] The title is concise and informative.
- [ ] The description explains in detail what this PR is about.
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- [ ] I have updated the documentation accordingly.

### ⌛ Dependencies

<!-- List all open PRs that this PR logically depends on. For example,
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<!-- - sagemath#12345: short description why this is a dependency -->
<!-- - sagemath#34567: ... -->

- Depends on sagemath#37099 (merged to resolve merge conflict)
    
URL: sagemath#37762
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee, Matthias Köppe

sagemathgh-37762: `dist.yml`: Download optional/experimental tarballs for GitHub Release assets
    
<!-- ^ Please provide a concise and informative title. -->
<!-- ^ Don't put issue numbers in the title, do this in the PR
description below. -->
<!-- ^ For example, instead of "Fixes sagemath#12345" use "Introduce new method
to calculate 1 + 2". -->
<!-- v Describe your changes below in detail. -->
<!-- v Why is this change required? What problem does it solve? -->
<!-- v If this PR resolves an open issue, please link to it here. For
example, "Fixes sagemath#12345". -->

- Fixes sagemath#37752, at least for the non-"huge" tarballs (we skip the "huge"
tarballs here).
- More options for `sage -package download` (a subset of what `sage
-package list` supports)
- Also remove some zombie package files

Test run: https://github.com/mkoeppe/sage/actions/workflows/dist.yml

### 📝 Checklist

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- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation accordingly.

### ⌛ Dependencies

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<!-- - sagemath#12345: short description why this is a dependency -->
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- Depends on sagemath#37099 (merged to resolve merge conflict)
    
URL: sagemath#37762
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee, Matthias Köppe

sagemathgh-38111: GH Actions: Fix upload of macOS wheels to PyPI
    
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The change made in sagemath#37099 to accommodate the new design of
actions/{up,down}load-artifact@v4 broke the upload of macOS wheels to
PyPI (see https://github.com/sagemath/sage/actions/runs/9234698750/job/2
5408786962#step:8:23); this was masked so far because the build of macOS
wheels was broken until sagemath#36525.

Here we revert to using a separate job that uploads all platform wheels.
This uses the new keywords `pattern` and `merge-multiple` of
actions/download-artifact@v4

Example run:
https://github.com/mkoeppe/sage/actions/runs/9291646178/job/25572343853

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preview.

### ⌛ Dependencies

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URL: sagemath#38111
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee