Report tool traceback on utf-8 decode

[Eric MacDonald]

Brief Description
-----------------
The Report Tool did a utf-8 UnicodeDecodeError traceback while analyzing a bundle.

Code should have a try/except block in this path.

Severity
--------
Major if it happens.

Steps to Reproduce
------------------
report.py -d <path to bundle>

Expected Behavior
------------------
Report analysis completes without execution error.

Actual Behavior
----------------
Report analysis is incomplete.

Reproducibility
---------------
Seen on one collect bundle.

System Configuration
--------------------
suspect System Controller

Branch/Pull Time/Commit
-----------------------
Any prior to this issue being resolved. June 4th, 2024 time frame.

Last Pass
---------
Tool needs to handle string parsing case better

Timestamp/Logs
--------------
Traceback (most recent call last):
  File "/folk/cgts/tools/report/report.py", line 907, in <module>
    engine.execute(plugins, output_dir)
  File "/folk/cgts/tools/report/execution_engine.py", line 382, in execute
    plugin.state["exclude"]),
  File "/folk/cgts/tools/report/plugin_algs/daemon_failures.py", line 40, in daemon_failures
    data = substring(start, end, daemon_substrings, daemon_files, exclude_list)
  File "/folk/cgts/tools/report/plugin_algs/substring.py", line 59, in substring
    status = _continue(start, end, file)
  File "/folk/cgts/tools/report/plugin_algs/substring.py", line 140, in _continue
    line = f.readline()
  File "/usr/local/lib/python3.6/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 6363: ordinal not in range(128)

Test Activity
-------------
PV

Workaround
----------
Analyze bundle manually.
No easy workaround.
Issue will be fixed soon. Pull new content.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/starlingx/utilities/+/921081