DAOS-16111 test: new utility daos_sys_logscan (#15629)

Scan a list of engine logfiles to produce a nested dictionary of
pools and a sequence of key events such as pool leadership terms,
pool map version updates (due to target state changes), rebuild
start and progress update events and total rebuild duration. This
first version focuses on finding the pool service leader engine log
file and producing this information. Future updates to the tool
can potentially include finer-grain tracking of operations across all
pool storage engine log files.

The supporting class LogLine in cart_logparse.py has a tiny change
to support this new utility.

Signed-off-by: Kenneth Cain <[email protected]>

src/tests/ftest/cart/util/cart_logparse.py

@@ -1,5 +1,6 @@
 # /*
 #  * (C) Copyright 2016-2023 Intel Corporation.
+#  * (C) Copyright 2025 Hewlett Packard Enterprise Development LP
 #  *
 #  * SPDX-License-Identifier: BSD-2-Clause-Patent
 # */
@@ -104,7 +105,8 @@ def __init__(self, line):
         except KeyError as error:
             raise InvalidLogFile(fields[4]) from error
 
-        # self.time_stamp = fields[0]
+        self.time_stamp = fields[0]
+        self.hostname = fields[1]
         self._fields = fields[5:]
         try:
             if self._fields[1][-2:] == '()':