cecf/opentelemetry-java-instrumentation: java agent代码 @ v250_kafka

dingjiefei b47aca99d5 Allow configuring MDC key names for trace_id, span_id, trace_flags (#11329)		9 月之前
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javaagent	b47aca99d5 Allow configuring MDC key names for trace_id, span_id, trace_flags (#11329)	9 月之前
library	b47aca99d5 Allow configuring MDC key names for trace_id, span_id, trace_flags (#11329)	9 月之前
testing	b47aca99d5 Allow configuring MDC key names for trace_id, span_id, trace_flags (#11329)	9 月之前