Remove deprecated --jaeger.tags CLI flag

[yurishkuro]

Resolves part of #2738

[codecov]

Codecov Report

Merging #2753 (968aee7) into master (9e5acac) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2753      +/-   ##
==========================================
+ Coverage   95.86%   95.88%   +0.02%     
==========================================
  Files         217      217              
  Lines        9638     9634       -4     
==========================================
- Hits         9239     9238       -1     
+ Misses        329      328       -1     
+ Partials       70       68       -2     

Impacted Files	Coverage Δ
cmd/agent/app/reporter/flags.go	100.00% <ø> (+25.00%)	⬆️
...lugin/sampling/strategystore/adaptive/processor.go	99.07% <0.00%> (-0.93%)	⬇️
cmd/query/app/static_handler.go	96.77% <0.00%> (+1.61%)	⬆️

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[yurishkuro]

@jpkrohling any concerns with the changes to OTEL part?

[jpkrohling]

LGTM

[jpkrohling]

codecov/patch is still running (!!). Will merge on green.

[yurishkuro]

codecov has been glitchy the past few days, the logs already show the report, but status not updated.