Add codeowners for the elasticsearch exporter

[urso]

Description: Add codeowners for the elasticsearch exporter

Link to tracking Issue: #1800

Testing: -
Documentation: -

[codecov]

Codecov Report

Merging #2462 (9629693) into main (bbb76e9) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2462      +/-   ##
==========================================
- Coverage   90.93%   90.92%   -0.01%     
==========================================
  Files         411      411              
  Lines       20467    20467              
==========================================
- Hits        18611    18610       -1     
- Misses       1395     1396       +1     
  Partials      461      461              

Flag	Coverage Δ
integration	69.22% <ø> (-0.07%)	⬇️
unit	89.77% <ø> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
processor/groupbytraceprocessor/event.go	95.96% <0.00%> (-0.81%)	⬇️

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