opentelemetry-sdk 1.9.0

opentelemetry v1.9.0 & v0.28b0

on Python PyPI

Changes

• Fix SpanLimits global span limit defaulting when set to 0
  (#2398)
• Add Python version support policy
  (#2397)
• Decode URL-encoded headers in environment variables
  (#2312)
• [exporter/opentelemetry-exporter-otlp-proto-grpc] Add OTLPMetricExporter
  (#2323)
• Complete metric exporter format and update OTLP exporter
  (#2364)
• [api] Add NoOpTracer and NoOpTracerProvider. Marking _DefaultTracer and _DefaultTracerProvider as deprecated.
  (#2363)
• [exporter/opentelemetry-exporter-otlp-proto-grpc] Add Sum to OTLPMetricExporter
  (#2370)
• [api] Rename _DefaultMeter and _DefaultMeterProvider to NoOpMeter and NoOpMeterProvider.
  (#2383)
• [exporter/opentelemetry-exporter-otlp-proto-grpc] Add Gauge to OTLPMetricExporter
  (#2408)
• [logs] prevent None from causing problems
  (#2410)