feat: upgrade to otel go v1.19.0

[tim-mwangi]

Description

Upgrade to otel go v1.19.0

Testing

Unit tests and manual tests

Checklist:

• [ ✅ ] My changes generate no new warnings
• [✅ ] Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

Merging #216 (b9d1d48) into main (e89d845) will decrease coverage by 0.38%.
The diff coverage is 6.45%.

@@            Coverage Diff             @@
##             main     #216      +/-   ##
==========================================
- Coverage   59.19%   58.81%   -0.38%     
==========================================
  Files          55       55              
  Lines        2235     2229       -6     
==========================================
- Hits         1323     1311      -12     
- Misses        854      859       +5     
- Partials       58       59       +1     

Files	Coverage Δ
...n/opentelemetry/batchspanprocessor/env.modified.go	30.23% <50.00%> (ø)
...ntation/opentelemetry/batchspanprocessor/logger.go	0.00% <0.00%> (ø)
...atchspanprocessor/batch_span_processor.modified.go	13.49% <0.00%> (-4.21%)	⬇️

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