Show working example for OTLP Http

[cijothomas]

Fixes #1659
Based on #1752 (comment), the example for otlp-http is modified to use HTTP/protobuf instead of json.
Also modified the example to use log appenger instead of tracing appender, as tracing causes #761, and cannot be used without fixing.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.6%. Comparing base (348ec9e) to head (b18a48e).
Report is 28 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1756     +/-   ##
=======================================
+ Coverage   71.0%   71.6%   +0.5%     
=======================================
  Files        135     136      +1     
  Lines      20751   20845     +94     
=======================================
+ Hits       14746   14934    +188     
+ Misses      6005    5911     -94     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[TommyCpp]

I am not sure if the provided example will help users understand how to enable hyper clients. As it uses reqwest clients

[cijothomas]

I am not sure if the provided example will help users understand how to enable hyper clients. As it uses reqwest clients

Agree. Should we fix that in the doc itself, instead of maintaining full blown examples for each transport/clients?

[ibigbug]

yeah i think a doc would be super helpfule. i'm struggling updating to the latest versions with a combination of

# opentelemetry
opentelemetry = "0.23"
opentelemetry_sdk = { version = "0.23", features = ["rt-tokio"] }
tracing-opentelemetry = "0.23"
opentelemetry-jaeger-propagator = "0.2.0"
opentelemetry-jaeger = { version = "0.22", features = ["collector_client", "hyper_collector_client", "rt-tokio"] }
opentelemetry-otlp = { version = "0.16.0", features = ["http-proto"] }

also to be frank i feel the rust community library versions are a bit fragile, it sometimes require a fair bit of work to upgrade all eco system crates when 1 crate gets a breaking change