Add W3C traceparent headers to distributed tracing

[sl0thentr0py]

closes #2276

[codecov]

Codecov Report

Attention: Patch coverage is 76.47059% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 98.61%. Comparing base (186b1e4) to head (9974c9f).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2310      +/-   ##
==========================================
- Coverage   98.67%   98.61%   -0.06%     
==========================================
  Files         205      205              
  Lines       13329    13359      +30     
==========================================
+ Hits        13152    13174      +22     
- Misses        177      185       +8     

Components	Coverage Δ
sentry-ruby	98.95% <76.47%> (-0.08%)	⬇️
sentry-rails	97.37% <ø> (ø)
sentry-sidekiq	96.98% <ø> (ø)
sentry-resque	97.08% <ø> (ø)
sentry-delayed_job	98.91% <ø> (ø)
sentry-opentelemetry	100.00% <ø> (ø)

Files	Coverage Δ
sentry-ruby/lib/sentry-ruby.rb	96.66% <100.00%> (+0.06%)	⬆️
sentry-ruby/lib/sentry/hub.rb	99.40% <100.00%> (+0.01%)	⬆️
sentry-ruby/lib/sentry/span.rb	100.00% <100.00%> (ø)
sentry-ruby/spec/sentry_spec.rb	99.85% <ø> (ø)
sentry-ruby/lib/sentry/propagation_context.rb	87.14% <61.90%> (-12.86%)	⬇️

... and 1 file with indirect coverage changes