vendor: update buildkit to v0.14.0-rc1

Update buildkit dependency to v0.14.0-rc1. Update the tracing
infrastructure to use the new detect API which updates how the delegated
exporter is configured.

Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>

vendor/github.com/moby/buildkit/util/tracing/detect/resource.go

@@ -0,0 +1,58 @@
+package detect
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"sync"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/sdk/resource"
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
+)
+
+var (
+	ServiceName string
+
+	detectedResource     *resource.Resource
+	detectedResourceOnce sync.Once
+)
+
+func Resource() *resource.Resource {
+	detectedResourceOnce.Do(func() {
+		res, err := resource.New(context.Background(),
+			resource.WithDetectors(serviceNameDetector{}),
+			resource.WithFromEnv(),
+			resource.WithTelemetrySDK(),
+		)
+		if err != nil {
+			otel.Handle(err)
+		}
+		detectedResource = res
+	})
+	return detectedResource
+}
+
+// OverrideResource overrides the resource returned from Resource.
+//
+// This must be invoked before Resource is called otherwise it is a no-op.
+func OverrideResource(res *resource.Resource) {
+	detectedResourceOnce.Do(func() {
+		detectedResource = res
+	})
+}
+
+type serviceNameDetector struct{}
+
+func (serviceNameDetector) Detect(ctx context.Context) (*resource.Resource, error) {
+	return resource.StringDetector(
+		semconv.SchemaURL,
+		semconv.ServiceNameKey,
+		func() (string, error) {
+			if ServiceName != "" {
+				return ServiceName, nil
+			}
+			return filepath.Base(os.Args[0]), nil
+		},
+	).Detect(ctx)
+}