opentelemetry v1.7.1 & v0.26b1

Highlights

• Experimental release for logging SDK 🎉 (https://github.com/open-telemetry/opentelemetry-python/tree/main/opentelemetry-sdk/src/opentelemetry/sdk/_logs)
• Python 3.10 is now officially supported 🎉

Changelog

• Add support for Python 3.10
  (#2207)
• remove X-B3-ParentSpanId for B3 propagator as per OpenTelemetry specification
  (#2237)
• Populate auto.version in Resource if using auto-instrumentation
  (#2243)
• Return proxy instruments from ProxyMeter
  [#2169]
• Make Measurement a concrete class
  (#2153)
• Add metrics API
  (#1887)
• Make batch processor fork aware and reinit when needed
  (#2242)
• opentelemetry-sdk Sanitize env var resource attribute pairs
  (#2256)
• opentelemetry-test start releasing to pypi.org
  (#2269)