[fix][query] Correct query server legacy condition

[mahadzaryab1]

Which problem is this PR solving?

• Towards [query] Switch to use OTEL's http/grpc servers #6026

Description of the changes

• Fixes an issue from [query] Use OTEL's helpers for grpc server #6055 where the condition for routing to the legacy implementation was accidentally flipped.

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: yarn lint and yarn test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.42%. Comparing base (2fbc067) to head (651b78b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6120      +/-   ##
==========================================
- Coverage   96.46%   96.42%   -0.04%     
==========================================
  Files         352      352              
  Lines       20007    20007              
==========================================
- Hits        19300    19292       -8     
- Misses        524      531       +7     
- Partials      183      184       +1     

Flag	Coverage Δ
badger_v1	8.42% <ø> (ø)
badger_v2	1.70% <ø> (ø)
cassandra-4.x-v1	14.57% <ø> (ø)
cassandra-4.x-v2	1.64% <ø> (ø)
cassandra-5.x-v1	14.57% <ø> (ø)
cassandra-5.x-v2	1.64% <ø> (ø)
elasticsearch-6.x-v1	18.73% <ø> (ø)
elasticsearch-7.x-v1	18.81% <ø> (+0.01%)	⬆️
elasticsearch-8.x-v1	18.97% <ø> (-0.02%)	⬇️
elasticsearch-8.x-v2	1.70% <ø> (+0.01%)	⬆️
grpc_v1	8.77% <ø> (ø)
grpc_v2	6.71% <ø> (-0.02%)	⬇️
kafka-v1	8.99% <ø> (ø)
kafka-v2	1.70% <ø> (ø)
memory_v2	1.70% <ø> (+0.01%)	⬆️
opensearch-1.x-v1	18.86% <ø> (ø)
opensearch-2.x-v1	18.86% <ø> (+0.01%)	⬆️
opensearch-2.x-v2	1.69% <ø> (ø)
tailsampling-processor	0.48% <ø> (ø)
unittests	95.34% <100.00%> (-0.04%)	⬇️

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[yurishkuro]

doh!

[yurishkuro]

kinda sad that no tests caught this