[Otel] Remove debugging; Use different header

[imnasnainaec]

Reverts/revises parts of #3533, #3537

Resolves #3534 (hopefully)

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This change is 

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 74.61%. Comparing base (7fc04b1) to head (13147e1).
Report is 53 commits behind head on master.

Files with missing lines	Patch %	Lines
Backend/Otel/LocationProvider.cs	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3538      +/-   ##
==========================================
+ Coverage   66.34%   74.61%   +8.26%     
==========================================
  Files         234      285      +51     
  Lines        5847    11032    +5185     
  Branches      713     1341     +628     
==========================================
+ Hits         3879     8231    +4352     
- Misses       1740     2419     +679     
- Partials      228      382     +154     

Flag	Coverage Δ
backend	83.93% <75.00%> (?)
frontend	66.34% <ø> (+0.99%)	⬆️

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[andracc]

Reviewed 1 of 3 files at r1, 2 of 2 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)