Fix utf logging for persist firewall rules - CP: #2233

[larohra]

Description

Fix utf logging for persist firewall rules
(Cherry-pick #2233 )

Issue #

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made

Quality of Code and Contribution Guidelines

• I have read the contribution guidelines.

[codecov]

Codecov Report

Merging #2237 (3d6b2d0) into release-2.3.0.0 (2ab6ce4) will increase coverage by 0.02%.
The diff coverage is 66.66%.

@@                 Coverage Diff                 @@
##           release-2.3.0.0    #2237      +/-   ##
===================================================
+ Coverage            70.59%   70.62%   +0.02%     
===================================================
  Files                   96       96              
  Lines                13615    13616       +1     
  Branches              1928     1928              
===================================================
+ Hits                  9612     9616       +4     
+ Misses                3585     3584       -1     
+ Partials               418      416       -2     

Impacted Files	Coverage Δ
azurelinuxagent/common/persist_firewall_rules.py	76.38% <66.66%> (+0.16%)	⬆️
azurelinuxagent/ga/collect_telemetry_events.py	91.43% <0.00%> (+1.02%)	⬆️

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