WIP No expvar

[yurishkuro]

Which problem is this PR solving?

• Different version of Remove support for expvar-backed metrics #5437

Description of the changes

How was this change tested?

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 96.20%. Comparing base (5ddcaa9) to head (a3a2aaa).
Report is 39 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5494      +/-   ##
==========================================
+ Coverage   95.29%   96.20%   +0.91%     
==========================================
  Files         334      330       -4     
  Lines       16233    16151      -82     
==========================================
+ Hits        15469    15538      +69     
+ Misses        583      437     -146     
+ Partials      181      176       -5     

Flag	Coverage Δ
badger_v1	8.05% <ø> (+0.07%)	⬆️
badger_v2	1.93% <ø> (+0.04%)	⬆️
cassandra-3.x-v1	16.43% <ø> (+0.16%)	⬆️
cassandra-3.x-v2	1.85% <ø> (+0.04%)	⬆️
cassandra-4.x-v1	16.43% <ø> (+0.16%)	⬆️
cassandra-4.x-v2	1.85% <ø> (+0.04%)	⬆️
elasticsearch-5.x	?
elasticsearch-6.x	?
elasticsearch-7.x	?
elasticsearch-7.x-v1	18.89% <ø> (?)
elasticsearch-8.x	?
elasticsearch-8.x-v1	19.08% <ø> (?)
elasticsearch-8.x-v2	19.07% <ø> (?)
grpc_v1	9.53% <ø> (-0.61%)	⬇️
grpc_v2	7.58% <ø> (+0.23%)	⬆️
kafka	9.78% <ø> (+0.09%)	⬆️
opensearch-1.x	?
opensearch-1.x-v1	18.94% <ø> (?)
opensearch-2.x	?
opensearch-2.x-v1	18.94% <ø> (?)
opensearch-2.x-v2	18.94% <ø> (?)
unittests	93.91% <100.00%> (+0.41%)	⬆️

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