[v2][adjuster] Remove error return from adjuster interface

[mahadzaryab1]

Which problem is this PR solving?

• Towards Implement adjusters to operate on OTLP data format #6344

Description of the changes

• This PR removes the error return value from the v2 adjuster interface as none of the adjusters return any errors and errors instead recorded on the spans as warnings.

How was this change tested?

• CI

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: npm run lint and npm run test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.20%. Comparing base (9ddc9a4) to head (bc52738).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6383      +/-   ##
==========================================
+ Coverage   96.18%   96.20%   +0.02%     
==========================================
  Files         361      361              
  Lines       20614    20602      -12     
==========================================
- Hits        19828    19821       -7     
+ Misses        601      597       -4     
+ Partials      185      184       -1     

Flag	Coverage Δ
badger_v1	9.05% <ø> (ø)
badger_v2	1.64% <ø> (ø)
cassandra-4.x-v1-manual	15.01% <ø> (ø)
cassandra-4.x-v2-auto	1.59% <ø> (ø)
cassandra-4.x-v2-manual	1.59% <ø> (ø)
cassandra-5.x-v1-manual	15.01% <ø> (ø)
cassandra-5.x-v2-auto	1.59% <ø> (ø)
cassandra-5.x-v2-manual	1.59% <ø> (ø)
elasticsearch-6.x-v1	18.78% <ø> (ø)
elasticsearch-7.x-v1	18.85% <ø> (-0.01%)	⬇️
elasticsearch-8.x-v1	19.01% <ø> (ø)
elasticsearch-8.x-v2	1.64% <ø> (ø)
grpc_v1	10.69% <ø> (ø)
grpc_v2	7.96% <ø> (ø)
kafka-v1	9.37% <ø> (ø)
kafka-v2	1.64% <ø> (ø)
memory_v2	1.64% <ø> (ø)
opensearch-1.x-v1	18.90% <ø> (ø)
opensearch-2.x-v1	18.89% <ø> (-0.01%)	⬇️
opensearch-2.x-v2	1.63% <ø> (ø)
tailsampling-processor	0.47% <ø> (ø)
unittests	95.04% <100.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.