tests(chore): Move some serial tests into parallel sets

Additionally with the `tls.bash` helper for the `letsencrypt` tests.

test/tests/parallel/set1/spam_virus/disabled_clamav_spamassassin.bats

@@ -0,0 +1,48 @@
+load "${REPOSITORY_ROOT}/test/test_helper/common"
+
+setup_file() {
+  local PRIVATE_CONFIG
+  PRIVATE_CONFIG=$(duplicate_config_for_container .)
+
+  docker run --rm -d --name mail_disabled_clamav_spamassassin \
+    -v "${PRIVATE_CONFIG}":/tmp/docker-mailserver \
+    -v "$(pwd)/test/test-files":/tmp/docker-mailserver-test:ro \
+    -e ENABLE_CLAMAV=0 \
+    -e ENABLE_SPAMASSASSIN=0 \
+    -e AMAVIS_LOGLEVEL=2 \
+    -h mail.my-domain.com -t "${NAME}"
+
+    # TODO: find a better way to know when we have waited long enough
+    #       for ClamAV to should have come up, if it were enabled
+    wait_for_smtp_port_in_container mail_disabled_clamav_spamassassin
+    docker exec mail_disabled_clamav_spamassassin /bin/sh -c "nc 0.0.0.0 25 < /tmp/docker-mailserver-test/email-templates/existing-user1.txt"
+}
+
+teardown_file() {
+    docker rm -f mail_disabled_clamav_spamassassin
+}
+
+@test "checking process: ClamAV (ClamAV disabled by ENABLED_CLAMAV=0)" {
+  run docker exec mail_disabled_clamav_spamassassin /bin/bash -c "ps aux --forest | grep -v grep | grep '/usr/sbin/clamd'"
+  assert_failure
+}
+
+@test "checking spamassassin: should not be listed in amavis when disabled" {
+  run docker exec mail_disabled_clamav_spamassassin /bin/sh -c "grep -i 'ANTI-SPAM-SA code' /var/log/mail/mail.log | grep 'NOT loaded'"
+  assert_success
+}
+
+@test "checking ClamAV: should not be listed in amavis when disabled" {
+  run docker exec mail_disabled_clamav_spamassassin grep -i 'Found secondary av scanner ClamAV-clamscan' /var/log/mail/mail.log
+  assert_failure
+}
+
+@test "checking ClamAV: should not be called when disabled" {
+  run docker exec mail_disabled_clamav_spamassassin grep -i 'connect to /var/run/clamav/clamd.ctl failed' /var/log/mail/mail.log
+  assert_failure
+}
+
+@test "checking restart of process: ClamAV (ClamAV disabled by ENABLED_CLAMAV=0)" {
+  run docker exec mail_disabled_clamav_spamassassin /bin/bash -c "pkill -f clamd && sleep 10 && ps aux --forest | grep -v grep | grep '/usr/sbin/clamd'"
+  assert_failure
+}