[BUILD] Build warning in http_operation_curl.cc on Windows

[marcalff]

When building on Windows, in file http_operation_curl.cc, the following line causes warnings:

  static std::uniform_real_distribution<float> dis(0.8, 1.2);

**redacted**\opentelemetry-cpp-1.19.0\ext\src\http\client\curl\http_operation_curl.cc(468,57):
 warning C4305: 'argument': truncation from 'double' to '_Ty'
[**redacted**\opentelemetry-cpp-1.19.0\ext\src\http\client\curl\opentelemetry_http_client_curl.vcxproj]

[malkia]

I guess it should be

dis(0.8f, 1.2f)

to avoid conversion from double to float

[marcalff]

We need to:

• fix this warning
• make sure the maintainer CI on windows catches warnings like this (include the OTLP GRPC exporter)

[chusitoo]

We need to:

• fix this warning
• make sure the maintainer CI on windows catches warnings like this (include the OTLP GRPC exporter)

I can look into this. Maintainer CI on Windows could be a little bit of a challenge, though.