ci: show all logs at the end of a run (#22226)

* ci: show all logs at the end of a run

The current CI won't show the logs on error due to early exit. This will
at least show the logs, although for all tests at once.

.github/workflows/ci.yml

@@ -211,6 +211,9 @@ jobs:
       - name: Setup common environment variables
         run: ./.github/workflows/env.sh ${{ matrix.flavor }}
 
+      - name: Create log dir
+        run: mkdir -p "${LOG_DIR}"
+
       - name: Install apt packages
         if: matrix.os == 'linux'
         run: ./.github/scripts/install_deps_ubuntu.sh
@@ -242,9 +245,6 @@ jobs:
           cmake -B build -G Ninja ${CMAKE_FLAGS}
           cmake --build build
 
-      - name: Prepare sanitizer
-        run: ./ci/run_tests.sh prepare_sanitizer
-
       - if: "!cancelled()"
         name: Determine if run should be aborted
         id: abort_job
@@ -272,6 +272,10 @@ jobs:
         name: Installtests
         run: ./ci/run_tests.sh installtests
 
+      - if: success() || failure() && steps.abort_job.outputs.status == 'success'
+        name: Show logs
+        run: cat $(find "$LOG_DIR" -type f)
+
   old_cmake:
     name: Test oldest supported cmake
     runs-on: ubuntu-22.04