Wheel CI: Skip tests on musllinux and Python 3.7 aarch64

NumPy doesn't provide wheels for musllinux or Aarch64 Python 3.7, on those runs it builds NumPy from scratch when testing, which takes very long.

This commit skips testing on those platforms.

.github/workflows/build.yml

@@ -135,7 +135,7 @@ jobs:
       CIBW_REPAIR_WHEEL_COMMAND_MACOS: ""
       MACOSX_DEPLOYMENT_TARGET: 10.9
       CIBW_BUILD_VERBOSITY_MACOS: 3
-      CIBW_TEST_SKIP: "*-macosx_arm64 *-macosx_universal2:arm64"
+      CIBW_TEST_SKIP: "*-macosx_arm64 *-macosx_universal2:arm64 *-musllinux*"
       CIBW_ARCHS_MACOS: "x86_64 arm64"
       CIBW_REPAIR_WHEEL_COMMAND_WINDOWS: ""
       CIBW_BEFORE_ALL_LINUX: "pip install cmake; bash {project}/ci/install_libspatialindex.bash"
@@ -189,6 +189,7 @@ jobs:
         CIBW_ARCHS_LINUX: aarch64
         CIBW_TEST_REQUIRES: pytest numpy
         CIBW_TEST_COMMAND: "pytest -v {project}/tests"
+        CIBW_TEST_SKIP: "cp37-* *-musllinux*"
         CIBW_BEFORE_ALL_LINUX: "pip install cmake; bash {project}/ci/install_libspatialindex.bash"
     - uses: actions/upload-artifact@v3
       with: