ci, refactor: Generalize use of matrix.configuration.env_vars

Author: hebasto

.github/workflows/ci.yml

@@ -132,6 +132,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        configuration:
+          - env_vars: {}
         cc:
           - 'i686-linux-gnu-gcc'
           - 'clang --target=i686-pc-linux-gnu -isystem /usr/i686-linux-gnu/include'
@@ -150,6 +152,7 @@ jobs:
       - *checkout
 
       - name: CI script
+        env: ${{ matrix.configuration.env_vars }}
         uses: ./.github/actions/run-in-docker-action
         with:
           dockerfile: ./ci/linux-debian.Dockerfile
@@ -162,6 +165,11 @@ jobs:
     runs-on: ubuntu-latest
     needs: docker_cache
 
+    strategy:
+      matrix:
+        configuration:
+          - env_vars: {}
+
     env:
       WRAPPER_CMD: 'qemu-s390x'
       SECP256K1_TEST_ITERS: 16
@@ -179,6 +187,7 @@ jobs:
       - *checkout
 
       - name: CI script
+        env: ${{ matrix.configuration.env_vars }}
         uses: ./.github/actions/run-in-docker-action
         with:
           dockerfile: ./ci/linux-debian.Dockerfile
@@ -265,6 +274,11 @@ jobs:
     runs-on: ubuntu-latest
     needs: docker_cache
 
+    strategy:
+      matrix:
+        configuration:
+          - env_vars: {}
+
     env:
       WRAPPER_CMD: 'qemu-ppc64le'
       SECP256K1_TEST_ITERS: 16
@@ -282,6 +296,7 @@ jobs:
       - *checkout
 
       - name: CI script
+        env: ${{ matrix.configuration.env_vars }}
         uses: ./.github/actions/run-in-docker-action
         with:
           dockerfile: ./ci/linux-debian.Dockerfile
@@ -649,6 +664,11 @@ jobs:
     runs-on: ubuntu-latest
     needs: docker_cache
 
+    strategy:
+      matrix:
+        configuration:
+          - env_vars: {}
+
     env:
       CC: 'g++'
       CFLAGS: '-fpermissive -g'
@@ -665,6 +685,7 @@ jobs:
       - *checkout
 
       - name: CI script
+        env: ${{ matrix.configuration.env_vars }}
         uses: ./.github/actions/run-in-docker-action
         with:
           dockerfile: ./ci/linux-debian.Dockerfile