Test enable groups as specified by PR labels (#2357)

* Allow CIBW_ENABLE to control the wheels built in testing

* Set CIBW_ENABLE using PR labels

* Add docs

* Build everything on the main branch

* Add CIBW_ENABLE=all option

This was mostly for use in the `main` building case, because otherwise it's maybe a bit too easy to forget to update this file when adding an enable group

* Remove dead code

* Make unit tests robust to the value of CIBW_ENABLE

* Fix tests that explicitly choose pypy

* Fix test expectation

* Don't expect impossible wheels in expected_wheels

* Simplify logic in expected_wheels

* CircleCI- run with CIBW_ENABLE=all only on the main branch

* Azure pipelines - run with CIBW_ENABLE=all on main branch

* Update gitlab to run CIBW_ENABLE=all on main

* Set CIBW_ENABLE=all on travis - it only runs on main anyway

* Fix job name error on CircleCI

* Fix tests for graalpy

* Update the test configuration to use the label

* Remove duplication of default value. Make it affect sample build too

* Move the action to after deps are installed

* GraalPy workaround for this assumption

* Make unit test resilient to changing CIBW_ENABLE

.circleci/config.yml

@@ -1,7 +1,30 @@
-version: 2
+version: 2.1
+
+commands:
+  cibw_prepare_environment:
+    description: "Prepare the environment for testing."
+    steps:
+      - run:
+          name: Prepare the environment.
+          command: bash .circleci/prepare.sh
+  cibw_run_tests:
+    description: "Runs tests, with CIBW_ENABLE=all on the main branch"
+    steps:
+      - run:
+          name: Test
+          command: |
+            if [ "${CIRCLE_BRANCH}" == "main" ]; then
+              echo "INFO: Exporting CIBW_ENABLE=all for main branch test run."
+              export CIBW_ENABLE=all
+            else
+              echo "INFO: CIBW_ENABLE not set for this branch test run."
+            fi
+
+            venv/bin/python ./bin/run_tests.py
+          no_output_timeout: 30m
 
 jobs:
-  osx-python3.12:
+  osx-python312:
     macos:
       xcode: 15.4.0
     resource_class: macos.m1.medium.gen1
@@ -9,16 +32,10 @@ jobs:
       PYTHON: python3
     steps:
       - checkout
+      - cibw_prepare_environment
+      - cibw_run_tests
 
-      - run:
-          name: Prepare the environment.
-          command: bash .circleci/prepare.sh
-      - run:
-          name: Test.
-          command: venv/bin/python ./bin/run_tests.py
-          no_output_timeout: 30m
-
-  linux-python3.12:
+  linux-python312:
     docker:
       - image: cimg/python:3.12
     environment:
@@ -29,14 +46,8 @@ jobs:
     steps:
       - checkout
       - setup_remote_docker
-
-      - run:
-          name: Prepare the environment.
-          command: bash .circleci/prepare.sh
-      - run:
-          name: Test.
-          command: venv/bin/python ./bin/run_tests.py
-          no_output_timeout: 30m
+      - cibw_prepare_environment
+      - cibw_run_tests
 
   linux-aarch64:
     machine:
@@ -49,19 +60,13 @@ jobs:
       PYTEST_ADDOPTS: -k "unit_test or main_tests or test_0_basic or test_docker_images"
     steps:
       - checkout
-
-      - run:
-          name: Prepare the environment.
-          command: bash .circleci/prepare.sh
-      - run:
-          name: Test.
-          command: venv/bin/python ./bin/run_tests.py
-          no_output_timeout: 30m
+      - cibw_prepare_environment
+      - cibw_run_tests
 
 workflows:
   version: 2
   all-tests:
     jobs:
-      - osx-python3.12
-      - linux-python3.12
+      - osx-python312
+      - linux-python312
       - linux-aarch64