[DPE-5312] Retrieve charm tracing libs from tempo_coordinator_k8s instead

[shayancanonical]

Issue

We are unable to relay traces through grafana-agent yet due to canonical/grafana-agent-operator#195. However, in the meantime, we would like to update the charm tracing libs as they now reside in tempo_coordinator_k8s

Solution

Update location of charm tracing libs

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.50%. Comparing base (691cc42) to head (3e768e4).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #386   +/-   ##
=======================================
  Coverage   74.50%   74.50%           
=======================================
  Files           9        9           
  Lines        1322     1322           
  Branches      228      228           
=======================================
  Hits          985      985           
  Misses        262      262           
  Partials       75       75           

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