fix(agent): Ensure import of required package for pprof support (#15054)

Co-authored-by: Josh Powers <powersj@fastmail.com>

cmd/telegraf/pprof.go

@@ -3,6 +3,7 @@ package main
 import (
 	"log"
 	"net/http"
+	_ "net/http/pprof" //nolint:gosec // Import for pprof, only enabled via CLI flag
 	"strings"
 	"time"
 )