3.0.0 beta 12

#1300 Clean Up Shim Files & Fix Check for Extended Metrics Env Var.
#1298 Update Support Status of Native Metrics & Env Vars.
#1296 Update agent backoff logic
#1292 Update Warning Tests and Add Console Logging by Default.
#1282 Fix Auto Exception Collection.
#1275 Add Note Regarding Our Support for Node Versions.
#1272 Auto collection of logs aligning to OpenTelemetry.
#1271 Update Prefix Version in Auto-Attach Scenarios.
#1270 Update Instrumentation Options Type in Docs and Export from Index.
#1268 Detect Distro Already Loaded in Agent.
#1266 Update Node.js runtime check in Agent.
#1264 Update Beta Code Examples README.