TT#81700 set_config.sh: create log dir before pid_watcher execution

> Traceback (most recent call last):
>  File "/usr/local/devel/kamailio-config-tests/bin/pid_watcher.py", line 33, in <module>
>    logging.basicConfig(
>  File "/usr/lib/python3.9/logging/__init__.py", line 1999, in basicConfig
>    h = FileHandler(filename, mode,
>  File "/usr/lib/python3.9/logging/__init__.py", line 1142, in __init__
>    StreamHandler.__init__(self, self._open())
>  File "/usr/lib/python3.9/logging/__init__.py", line 1171, in _open
>    return open(self.baseFilename, self.mode, encoding=self.encoding,
> FileNotFoundError: [Errno 2] No such file or directory: '/usr/local/devel/kamailio-config-tests/log/pid_watcher.log'

Change-Id: I79b520ff3ee58d0e53a81c59ac263d3018f9a190

set_config.sh

@@ -95,6 +95,7 @@ config() {
   echo "$(date) - Setting network config"
   "${BIN_DIR}/network_config.pl" -g "${GROUP}" "${BASE_DIR}/config.yml" on
   if [ "${PROFILE}" == "PRO" ]; then
+    mkdir -p "${BASE_DIR}/log"
     echo "$(date) - Exec pid_watcher with timeout[${TIMEOUT}]"
     # shellcheck disable=SC2086
     ( timeout "${TIMEOUT}" "${BIN_DIR}/pid_watcher.py" ${PIDWATCH_OPTS[*]} )&