opentelemetry-proto: fix package type and settings

[tuxu]

opentelemetry-proto packages the protobuf definitions for OpenTelemetry. Marking it as a "build-script" implied visibility=False to downstream packages like opentelemetry, which made a CppInfo quality check fail with "required component package 'opentelemetry-proto::' not in dependencies".

This also removes settings, since there is no actual build step and the package won't be affected by any config properties.

Fixes #18967.

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• I've read the contributing guidelines.
• I've used a recent Conan client version close to the currently deployed.
• I've tried at least one configuration locally with the conan-center hook activated.

[CLAassistant]

All committers have signed the CLA.

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 1 (ee11cbc1f8b27b5a243fc4e52f16f70a339952c2):

• opentelemetry-proto/1.0.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.20.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.18.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.19.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.17.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.16.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.11.0:
  All packages built successfully! (All logs)

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Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 1 (ee11cbc1f8b27b5a243fc4e52f16f70a339952c2):

• opentelemetry-proto/0.17.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.20.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.18.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/1.0.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.19.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.11.0:
  All packages built successfully! (All logs)

• opentelemetry-proto/0.16.0:
  All packages built successfully! (All logs)

[AbrilRBS]

Thanks for bringing it up to our attention. I'll check if there's a package type that better fits the use-case just in case :)