Migrate OpenTelemetry proto dependency

[nickshevr]

What changed

• moved the vendored OpenTelemetry proto package from contrib/libs/opentelemetry-proto to contrib/proto/opentelemetry
• updated OpenTelemetry Proto from 1.3.1 to 1.9.0 following Arcanum review 14529704
• migrated NBS and Wilson PEERDIR entries and generated protobuf includes to the new path
• updated .mapping.json for generated CMake files
• retained the NBS-specific Go/Java exclusions because this open-source checkout does not contain the Arcadia-only TypeScript and Go build toolchains

Why

Arcadia moved the shared OpenTelemetry proto dependency to contrib/proto/opentelemetry. NBS consumers need to use the same package location and current proto definitions.

Validation

• git diff --check
• verified that no references to contrib/libs/opentelemetry-proto remain
• parsed all proto files and generated C++ protobuf sources successfully with the system protoc
• attempted ya make for the proto library, storage OpenTelemetry implementation, and Wilson; the local open-source checkout cannot complete it because resource mappings for PROTOC-sbr:5841614302 and TEST_TOOL_HOST-sbr:8580447807 are unavailable

[github-actions]

Hi! Thank you for contributing!
The tests on this PR will run after a maintainer adds an ok-to-test label to this PR manually. Thank you for your patience!