[refactor] Move SPM v2 config to cmd/jaeger/ with all other configs

[yurishkuro]

Which problem is this PR solving?

• This config was demonstrating a setup with span metrics processor, but was stashed in example directory

Description of the changes

• Move the config to /cmd/jaeger/ where all other v2 configs are

How was this change tested?

• ran SPM locally
• CI

Follow-ups

• check if SPM documentation points to the old location of the config

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.45%. Comparing base (d6ca388) to head (da5ed5d).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6256      +/-   ##
==========================================
- Coverage   96.46%   96.45%   -0.02%     
==========================================
  Files         355      355              
  Lines       20150    20150              
==========================================
- Hits        19438    19435       -3     
- Misses        525      527       +2     
- Partials      187      188       +1     

Flag	Coverage Δ
badger_v1	8.31% <ø> (ø)
badger_v2	1.67% <ø> (ø)
cassandra-4.x-v1	14.39% <ø> (ø)
cassandra-4.x-v2	1.61% <ø> (ø)
cassandra-5.x-v1	14.39% <ø> (ø)
cassandra-5.x-v2	1.61% <ø> (ø)
elasticsearch-6.x-v1	18.59% <ø> (-0.01%)	⬇️
elasticsearch-7.x-v1	18.67% <ø> (-0.01%)	⬇️
elasticsearch-8.x-v1	18.85% <ø> (+<0.01%)	⬆️
elasticsearch-8.x-v2	1.66% <ø> (-0.01%)	⬇️
grpc_v1	9.44% <ø> (ø)
grpc_v2	6.98% <ø> (ø)
kafka-v1	8.88% <ø> (ø)
kafka-v2	1.67% <ø> (ø)
memory_v2	1.67% <ø> (+<0.01%)	⬆️
opensearch-1.x-v1	18.72% <ø> (ø)
opensearch-2.x-v1	18.72% <ø> (ø)
opensearch-2.x-v2	1.67% <ø> (ø)
tailsampling-processor	0.46% <ø> (ø)
unittests	95.36% <ø> (-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.

[yurishkuro]

@mahadzaryab1 please review