fill extra toxenvs with supported Python versions

Author: zacharyburnett

.github/workflows/tests.yml

@@ -65,15 +65,13 @@ jobs:
       envs: |
         - linux: py311-oldestdeps-xdist-cov
           pytest-results-summary: true
-        - linux: py311-xdist
-          posargs: -vv
-          pytest-results-summary: true
-        - linux: py312-xdist
-          pytest-results-summary: true
         # `tox` does not currently respect `requires-python` versions when creating testing environments;
         # if this breaks, add an upper pin to `requires-python` and revert this py3 to the latest working version
         - linux: py313-cov-xdist
           coverage: codecov
           pytest-results-summary: true
         - macos: py313-xdist
           pytest-results-summary: true
+      fill: true
+      fill_platforms: linux
+      fill_factors: xdist

.github/workflows/tests_extra.yml

@@ -61,10 +61,6 @@ jobs:
       envs: |
         - linux: check-docs-links
           python-version: '3.13'
-        - macos: py311-xdist
-          pytest-results-summary: true
-        - macos: py312-xdist
-          pytest-results-summary: true
         # TODO: Merge stdevdeps into devdeps
         - linux: py313-stdevdeps-xdist
           pytest-results-summary: true
@@ -74,3 +70,6 @@ jobs:
           pytest-results-summary: true
         - macos: py313-devdeps-xdist
           pytest-results-summary: true
+      fill: true
+      fill_platforms: macos
+      fill-factors: xdist