ci: pass TEST_RUNTIME explicitly to the runsc critest

The runsc job runs on ubuntu-latest, which is moving to Ubuntu 26.04,
whose sudo (sudo-rs) does not support -E ("preserving the entire
environment is not supported, '-E' is ignored"). critest.sh then fails
on the unset TEST_RUNTIME, the only variable the step did not pass
explicitly.

Pass it on the sudo command line with the others and drop -E.

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

.github/workflows/ci.yml

@@ -765,8 +765,9 @@ jobs:
           cfg=$(mktemp /tmp/containerd-config-runsc-XXXXXX.toml)
           trap 'rm -f "$cfg"' EXIT
           script/runsc/write-containerd-runsc-config.sh "$cfg" "$CGROUP_DRIVER"
-          sudo -E \
+          sudo \
             CGROUP_DRIVER="$CGROUP_DRIVER" \
+            TEST_RUNTIME="$TEST_RUNTIME" \
             CONTAINERD_CONFIG_FILE="$cfg" \
             GOMAXPROCS="$GOMAXPROCS" \
             GOMEMLIMIT="$GOMEMLIMIT" \