Update Jaeger environment variables

[s-nadendla]

Updated Jaeger environment variables to match Open Telemetry specification:

Removed envServiceName and envTags since the Jaeger exporter already gets attributes from a Resource that has its own system for determining environment values; overriding these values here is unnecessary. Removed this logic and the corresponding tests

Addresses: #1639

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Sai Nadendla (7702ea9, 53c8e04)

[codecov]

Codecov Report

Merging #1752 (0489674) into main (5843280) will decrease coverage by 0.1%.
The diff coverage is 64.2%.

@@           Coverage Diff           @@
##            main   #1752     +/-   ##
=======================================
- Coverage   78.7%   78.6%   -0.2%     
=======================================
  Files        134     134             
  Lines       7180    7156     -24     
=======================================
- Hits        5656    5628     -28     
- Misses      1274    1278      +4     
  Partials     250     250             

Impacted Files	Coverage Δ
exporters/trace/jaeger/jaeger.go	93.4% <ø> (-0.1%)	⬇️
exporters/trace/jaeger/uploader.go	49.2% <33.3%> (-7.3%)	⬇️
exporters/trace/jaeger/agent.go	60.0% <75.0%> (+1.0%)	⬆️
exporters/trace/jaeger/env.go	100.0% <100.0%> (ø)
sdk/trace/batch_span_processor.go	83.9% <0.0%> (+1.5%)	⬆️

[XSAM]

Should we support OTEL_EXPORTER_JAEGER_AGENT_HOST and OTEL_EXPORTER_JAEGER_AGENT_PORT, which listed in #1639 ?

[MrAlias]

🥇

[MrAlias]

@s-nadendla this looks ready to merge, can you resolve the conflicts and merge the main branch in?