test: Rename testsuite-XX units to match test name

Having these named differently than the test itself mostly creates
unecessary confusion and makes writing logic against the tests harder
so let's rename the testsuite-xx units and scripts to just use the
test name itself.

test/units/TEST-23-UNIT-FILE.ExecReload.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: LGPL-2.1-or-later
+set -eux
+set -o pipefail
+
+# Test ExecReload= (PR #13098)
+
+systemd-analyze log-level debug
+
+export SYSTEMD_PAGER=
+SERVICE_PATH="$(mktemp /etc/systemd/system/execreloadXXX.service)"
+SERVICE_NAME="${SERVICE_PATH##*/}"
+
+echo "[#1] Failing ExecReload= should not kill the service"
+cat >"$SERVICE_PATH" <<EOF
+[Service]
+ExecStart=sleep infinity
+ExecReload=/bin/false
+EOF
+
+systemctl daemon-reload
+systemctl start "$SERVICE_NAME"
+systemctl status "$SERVICE_NAME"
+# The reload SHOULD fail but SHOULD NOT affect the service state
+(! systemctl reload "$SERVICE_NAME")
+systemctl status "$SERVICE_NAME"
+systemctl stop "$SERVICE_NAME"
+
+
+echo "[#2] Failing ExecReload= should not kill the service (multiple ExecReload=)"
+cat >"$SERVICE_PATH" <<EOF
+[Service]
+ExecStart=sleep infinity
+ExecReload=/bin/true
+ExecReload=/bin/false
+ExecReload=/bin/true
+EOF
+
+systemctl daemon-reload
+systemctl start "$SERVICE_NAME"
+systemctl status "$SERVICE_NAME"
+# The reload SHOULD fail but SHOULD NOT affect the service state
+(! systemctl reload "$SERVICE_NAME")
+systemctl status "$SERVICE_NAME"
+systemctl stop "$SERVICE_NAME"
+
+echo "[#3] Failing ExecReload=- should not affect reload's exit code"
+cat >"$SERVICE_PATH" <<EOF
+[Service]
+ExecStart=sleep infinity
+ExecReload=-/bin/false
+EOF
+
+systemctl daemon-reload
+systemctl start "$SERVICE_NAME"
+systemctl status "$SERVICE_NAME"
+systemctl reload "$SERVICE_NAME"
+systemctl status "$SERVICE_NAME"
+systemctl stop "$SERVICE_NAME"
+
+systemd-analyze log-level info