deps(otlp-transformer): move sdk-trace-base and sdk-metrics-base to dev-dependencies

[pichlermarc]

Which problem is this PR solving?

The @opentelemetry/otlp-transformer package currently depends on @opentelemetry/sdk-metrics-base and @opentelemetry/sdk-trace-base. The OTLP exporters are split between signal lines (currently metrics and traces), but via @opentelemetry/otlp-transformer, all exporters depend on both @opentelemetry/sdk-metrics-base and @opentelemetry/sdk-trace-base.

However, the @opentelemetry/otlp-transformer package currently only uses types from @opentelemetry/sdk-metrics-base and @opentelemetry/sdk-trace-base which means that they can be devDependencies instead.

This PR converts these dependencies to dev-dependencies and removes some outdated information from the README file.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• Unit tests
• Manual testing with the otlp-exporter-node example.

Checklist:

• Followed the style guidelines of this project
• Unit tests have been added
• Documentation has been updated

[codecov]

Codecov Report

Merging #2973 (b7d4a76) into main (22085fc) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2973      +/-   ##
==========================================
+ Coverage   92.52%   92.54%   +0.01%     
==========================================
  Files         183      183              
  Lines        5980     5980              
  Branches     1268     1268              
==========================================
+ Hits         5533     5534       +1     
+ Misses        447      446       -1     

Impacted Files	Coverage Δ
...emetry-core/src/platform/node/RandomIdGenerator.ts	93.75% <0.00%> (+6.25%)	⬆️

[dyladan]

I don't think it works that way because the types are included as a part of the public interface. The libcheck will likely fail

[pichlermarc]

With tree shaking this should not be necessary anyway. I'll close this PR. Sorry about that.