Enhancements:

• Added env var APPLICATIONINSIGHTS_PREVIEW_OTEL_API_SUPPORT to enable preview OpenTelemetry API support #1548
• Added env var APPLICATIONINSIGHTS_SELF_DIAGNOSTICS_FILE_PATH (and use that to log json config parsing errors) #1550
• RP integration improvements #1551, #1558, #1559
• Added env var APPLICATIONINSIGHTS_PREVIEW_LIVE_METRICS_ENABLED to disable live metrics #1552
• Remove unwanted custom dimension that showed up in 3.0.3-BETA #1565
• Add sampling overrides that can be used to implement telemetry filtering #1564
• Switch native performance counter collection to use OSHI #1482