Bump OTEL to 0.63.0

[kwapik]

Description of change

Bumps OTEL and FN OTEL to 0.63.0. This removes Istio 1.15 compat hack as it is included in the upstream OTEL.

Checklist

• Tested in playground or other setup
• Breaking changes

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This change is 

[codecov]

Codecov Report

Base: 37.45% // Head: 37.45% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (8665c9d) compared to base (65bab78).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #834      +/-   ##
==========================================
- Coverage   37.45%   37.45%   -0.01%     
==========================================
  Files         278      278              
  Lines       20489    20488       -1     
==========================================
- Hits         7674     7673       -1     
  Misses      12334    12334              
  Partials      481      481              

Impacted Files	Coverage Δ
pkg/otelcollector/otelcollector.go	75.86% <ø> (-0.41%)	⬇️
...metricsprocessor/internal/check_response_labels.go	96.96% <100.00%> (ø)
pkg/otelcollector/rollupprocessor/processor.go	87.15% <100.00%> (ø)

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