Fix ownership issue in dockers (#3726)

The previous attempt still failed the build. `git config --global safe.directory '*'` worked in another PR as an individual step in a job. So, try this instead.

.docker/ubuntu-20.04/Dockerfile

@@ -67,5 +67,5 @@ RUN apt-get install --no-install-recommends -y liblttng-ust-dev:arm64 \
     libnuma-dev:armhf \
     && rm -rf /var/lib/apt/lists/*
 
-RUN git config --system --add safe.directory "*"
+RUN git config --global safe.directory '*'
 

.docker/ubuntu-22.04/Dockerfile

@@ -67,4 +67,4 @@ RUN apt-get --no-install-recommends install -y liblttng-ust-dev:arm64 \
     libnuma-dev:armhf \
     && rm -rf /var/lib/apt/lists/*
 
-RUN git config --system --add safe.directory "*"
+RUN git config --global safe.directory '*'

.github/workflows/docker-publish-xcomp.yml

@@ -5,14 +5,14 @@ on:
     branches: [ main ]
     paths:
     - .github/workflows/docker-publish-xcomp.yml
-    - .docker/linux-20.04
-    - .docker/linux-22.04
+    - .docker/ubuntu-20.04/*
+    - .docker/ubuntu-22.04/*
   pull_request:
     branches: [ main ]
     paths:
     - .github/workflows/docker-publish-xcomp.yml
-    - .docker/linux-20.04
-    - .docker/linux-22.04
+    - .docker/ubuntu-20.04/*
+    - .docker/ubuntu-22.04/*
 
 permissions: read-all
 
@@ -67,8 +67,8 @@ jobs:
       - name: Build and push Docker image
         uses: docker/build-push-action@2eb1c1961a95fc15694676618e422e8ba1d63825
         with:
-          context: .docker/linux-${{ matrix.version }}
-          file: .docker/linux-${{ matrix.version }}/Dockerfile
+          context: .docker/ubuntu-${{ matrix.version }}
+          file: .docker/ubuntu-${{ matrix.version }}/Dockerfile
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ matrix.version }}
           labels: ${{ steps.meta.outputs.labels }}