New tracing system (#5388)

* update tracing config definitions

* new tracing system

* performance improvements

* only configure tracing in envoy if it is enabled in pomerium

* [tracing] refactor to use custom extension for trace id editing (#5420)

refactor to use custom extension for trace id editing

* set default tracing sample rate to 1.0

* fix proxy service http middleware

* improve some existing auth related traces

* test fixes

* bump envoyproxy/go-control-plane

* code cleanup

* test fixes

* Fix missing spans for well-known endpoints

* import extension apis from pomerium/envoy-custom

internal/telemetry/trace/util.go

@@ -0,0 +1,32 @@
+package trace
+
+import (
+	"unique"
+
+	oteltrace "go.opentelemetry.io/otel/trace"
+)
+
+var (
+	zeroSpanID  oteltrace.SpanID
+	zeroTraceID = unique.Make(oteltrace.TraceID([16]byte{}))
+)
+
+func ToSpanID(bytes []byte) (oteltrace.SpanID, bool) {
+	switch len(bytes) {
+	case 0:
+		return zeroSpanID, true
+	case 8:
+		return oteltrace.SpanID(bytes), true
+	}
+	return zeroSpanID, false
+}
+
+func ToTraceID(bytes []byte) (unique.Handle[oteltrace.TraceID], bool) {
+	switch len(bytes) {
+	case 0:
+		return zeroTraceID, true
+	case 16:
+		return unique.Make(oteltrace.TraceID(bytes)), true
+	}
+	return zeroTraceID, false
+}