Revert "Remove armv7 and ppc64le matrix entries"

This reverts commit 1b1bb2f.

Author: JR-1991

.github/workflows/publish_test_pypi.yml

@@ -27,6 +27,10 @@ jobs:
             target: x86
           - runner: ubuntu-latest
             target: aarch64
+          - runner: ubuntu-latest
+            target: armv7
+          - runner: ubuntu-latest
+            target: ppc64le
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5