fix(otlp): add OTLP trace endpoint without trailing slash #4655
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We structured our OTLP endpoint URL to match the OTLP standard, but we added a trailing slash that isn't present in the spec. That causes OTLP clients that automatically apply the
/v1/traces
suffix to 404 when trying to reach Relay. Add a version without the trailing slash to match the spec.Out of an abundance of caution this PR keeps the version with the trailing slash just in case someone is using it (although there are no known clients).