ci: Move "ppc64le: Linux..." from Cirrus to GitHub Actions

.cirrus.yml

@@ -64,23 +64,6 @@ linux_container_snippet: &LINUX_CONTAINER
     # More than enough for our scripts.
     memory: 2G
 
-task:
-  name: "ppc64le: Linux (Debian stable, QEMU)"
-  << : *LINUX_CONTAINER
-  env:
-    WRAPPER_CMD: qemu-ppc64le
-    SECP256K1_TEST_ITERS: 16
-    HOST: powerpc64le-linux-gnu
-    WITH_VALGRIND: no
-    ECDH: yes
-    RECOVERY: yes
-    SCHNORRSIG: yes
-    ELLSWIFT: yes
-    CTIMETESTS: no
-  test_script:
-    - ./ci/ci.sh
-  << : *CAT_LOGS
-
 # Sanitizers
 task:
   << : *LINUX_CONTAINER

.github/workflows/ci.yml

@@ -326,6 +326,53 @@ jobs:
         run: env
         if: ${{ always() }}
 
+  ppc64le_debian:
+    name: "ppc64le: Linux (Debian stable, QEMU)"
+    runs-on: ubuntu-latest
+    needs: docker_cache
+
+    env:
+      WRAPPER_CMD: 'qemu-ppc64le'
+      SECP256K1_TEST_ITERS: 16
+      HOST: 'powerpc64le-linux-gnu'
+      WITH_VALGRIND: 'no'
+      ECDH: 'yes'
+      RECOVERY: 'yes'
+      SCHNORRSIG: 'yes'
+      ELLSWIFT: 'yes'
+      CTIMETESTS: 'no'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: CI script
+        uses: ./.github/actions/run-in-docker-action
+        with:
+          dockerfile: ./ci/linux-debian.Dockerfile
+          tag: linux-debian-image
+          command: >
+            git config --global --add safe.directory ${{ github.workspace }} &&
+            ./ci/ci.sh
+
+      - run: cat tests.log || true
+        if: ${{ always() }}
+      - run: cat noverify_tests.log || true
+        if: ${{ always() }}
+      - run: cat exhaustive_tests.log || true
+        if: ${{ always() }}
+      - run: cat ctime_tests.log || true
+        if: ${{ always() }}
+      - run: cat bench.log || true
+        if: ${{ always() }}
+      - run: cat config.log || true
+        if: ${{ always() }}
+      - run: cat test_env.log || true
+        if: ${{ always() }}
+      - name: CI env
+        run: env
+        if: ${{ always() }}
+
   mingw_debian:
     name: ${{ matrix.configuration.job_name }}
     runs-on: ubuntu-latest