feat: upgrade to otel go v1.31.0 and contrib v0.56.0

[tim-mwangi]

Description

Upgrade to otel go v1.31.0 and contrib otel go v0.56.0

Testing

Please describe the tests that you ran to verify your changes. Please summarize what did you test and what needs to be tested e.g. deployed and tested helm chart locally.

Checklist:

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

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 59.37%. Comparing base (94709da) to head (2187368).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...atchspanprocessor/batch_span_processor.modified.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #238      +/-   ##
==========================================
+ Coverage   58.84%   59.37%   +0.53%     
==========================================
  Files          72       72              
  Lines        2396     2895     +499     
==========================================
+ Hits         1410     1719     +309     
- Misses        905     1095     +190     
  Partials       81       81              

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