Version 1.29.0/0.50b0

• Fix crash exporting a log record with None body (#4276)
• Fix metrics export with exemplar and no context and filtering observable instruments (#4251)
• Fix recursion error with sdk disabled and handler added to root logger (#4259)
• sdk: setup EventLogger when OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED is set (#4270)
• api: fix logging of duplicate EventLogger setup warning (#4299)
• sdk: fix setting of process owner in ProcessResourceDetector (#4311)
• sdk: fix serialization of logs severity_number field to int (#4324)
• Remove TestBase.assertEqualSpanInstrumentationInfo method, use assertEqualSpanInstrumentationScope instead (#4310)
• sdk: instantiate lazily ExemplarBuckets in ExemplarReservoirs (#4260)
• semantic-conventions: Bump to 1.29.0 (#4337)