Fix telemetry unicode errors (Re-add #1937)

[larohra]

Description

Fix telemetry unicode errors (Re-add #1937)

Issue #

---

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 #2278 (3f58092) into develop (8f92fc7) will decrease coverage by 0.04%.
The diff coverage is 82.35%.

@@             Coverage Diff             @@
##           develop    #2278      +/-   ##
===========================================
- Coverage    70.67%   70.62%   -0.05%     
===========================================
  Files           96       96              
  Lines        13877    13891      +14     
  Branches      1981     1984       +3     
===========================================
+ Hits          9807     9810       +3     
- Misses        3644     3650       +6     
- Partials       426      431       +5     

Impacted Files	Coverage Δ
azurelinuxagent/common/utils/restutil.py	85.09% <ø> (ø)
azurelinuxagent/common/utils/textutil.py	62.44% <53.84%> (-0.54%)	⬇️
azurelinuxagent/common/event.py	85.22% <100.00%> (ø)
azurelinuxagent/common/protocol/wire.py	78.72% <100.00%> (+0.02%)	⬆️
azurelinuxagent/ga/collect_telemetry_events.py	89.72% <0.00%> (-1.72%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8f92fc7...3f58092. Read the comment docs.