[TASK] Run CI containers with docker

GitHub hosted runners ship both podman and docker. Since 2026-07-29
their podman/crun combination intermittently aborts the first container
start of a job with "OCI runtime error: crun: unknown version
specified" (exit code 126), independent of the job, the core version or
the PHP version. Neither the runner image nor the TYPO3 testing image
changed, and a rerun on another host clears it.

runTests.sh prefers podman whenever it is present and only falls back
to docker. That default is correct for the script and is kept, since
podman-only machines are exactly what it is built for. GitHub hosted
runners are the single place these workflows meet the broken
combination, so the override belongs in the workflows: every
"runTests.sh" call passes "-b docker" now, with the reasoning noted in
the workflow header so the flag can be dropped knowingly later.

Author: sbuerk

.github/workflows/ci.yml

@@ -1,5 +1,15 @@
 name: CI
 
+# Every "runTests.sh" call below passes "-b docker". The script prefers podman
+# whenever it is present and only falls back to docker, which is the right
+# default for it -- but GitHub hosted runners ship both, and since 2026-07-29
+# their podman/crun combination aborts the first container start of a job with
+# "OCI runtime error: crun: unknown version specified" (exit code 126). It is
+# intermittent, hits any job, and was traced to neither the runner image nor
+# the TYPO3 testing image changing. Selecting docker here avoids crun entirely
+# and leaves the script default and local runs untouched. Drop the flag once
+# GitHub stops producing the mismatch.
+
 on:
   push:
   pull_request:
@@ -21,18 +31,18 @@ jobs:
           ref: ${{ github.event_name == 'workflow_dispatch' && github.head_ref || '' }}
 
       - name: Composer install
-        run: Build/Scripts/runTests.sh -p ${{ matrix.php }} -s composerUpdate
+        run: Build/Scripts/runTests.sh -b docker -p ${{ matrix.php }} -s composerUpdate
 
       - name: CGL
         if: ${{ matrix.php <= '8.3' }}
-        run: Build/Scripts/runTests.sh -p ${{ matrix.php }} -s cgl -n
+        run: Build/Scripts/runTests.sh -b docker -p ${{ matrix.php }} -s cgl -n
 
       - name: Lint PHP
-        run: Build/Scripts/runTests.sh -p ${{ matrix.php }} -s lint
+        run: Build/Scripts/runTests.sh -b docker -p ${{ matrix.php }} -s lint
 
       - name: Phpstan
         if: ${{ matrix.php <= '8.3' }}
-        run: Build/Scripts/runTests.sh -p ${{ matrix.php }} -s phpstan
+        run: Build/Scripts/runTests.sh -b docker -p ${{ matrix.php }} -s phpstan
 
       - name: Unit Tests
-        run: Build/Scripts/runTests.sh -p ${{ matrix.php }} -s unit
+        run: Build/Scripts/runTests.sh -b docker -p ${{ matrix.php }} -s unit