Convert runlogwatch.sh to use inotifywait

This aligns with metal3 runlogwatch.sh[1] which is possible now that
inotify-tools package is available[2].

[1] https://github.com/metal3-io/ironic-image/pull/548/files
[2] openstack-k8s-operators/tcib@0795bb9

Jira: OSPRH-10240

templates/common/bin/runlogwatch.sh

@@ -3,15 +3,9 @@
 # Ramdisk logs path
 LOG_DIR=${LOG_DIR:-/var/lib/ironic/ramdisk-logs}
 
-while :; do
-    sleep 5
-
-    while read -r fn; do
-        echo
-        echo "************ Contents of $fn ramdisk log file bundle **************"
-        tar -xOzvvf "$fn" | sed -e "s/^/$(basename "$fn"): /"
-        rm -f "$fn"
-    # find all *.tar.gz files which are older than six seconds
-    done < <(find "${LOG_DIR}" -mmin +0.1 -type f -name "*.tar.gz")
-
-done
+inotifywait -m "${LOG_DIR}" -e close_write |
+    while read -r path _action file; do
+        echo "************ Contents of ${path}${file} ramdisk log file bundle **************"
+        tar -xOzvvf "${path}${file}" | sed -e "s/^/${file}: /"
+        rm -f "${path}/${file}"
+    done