Remove support for service_name and sampling_ratio in the
io.containerd.internal.v1.tracing plugin configuration, which was
previously deprecated in v1.6.29. Users should use standard OTel
environment variables instead (OTEL_SERVICE_NAME, OTEL_TRACES_SAMPLER,
etc.).
Re-add unit tests in pkg/tracing/plugin/otlp_test.go to verify
OTel environment variable configuration for service name, sampling,
exporters, and SDK disabling.
Assisted-by: Antigravity
Signed-off-by: Samuel Karp <samuelkarp@google.com>
Samuel Karp
531b3a37b9