chore: rename service -> coder_service, remove agent_id label (#19241)

Pyroscope uses `service` tag for top level distinction. So move our
`service` -> `coder_service`

coderd/coderd.go

@@ -14,12 +14,14 @@ import (
 	"net/url"
 	"path/filepath"
 	"regexp"
+	"runtime/pprof"
 	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
 
 	"github.com/coder/coder/v2/coderd/oauth2provider"
+	"github.com/coder/coder/v2/coderd/pproflabel"
 	"github.com/coder/coder/v2/coderd/prebuilds"
 	"github.com/coder/coder/v2/coderd/wsbuilder"
 
@@ -1340,7 +1342,13 @@ func New(options *Options) *API {
 			).Get("/connection", api.workspaceAgentConnectionGeneric)
 			r.Route("/me", func(r chi.Router) {
 				r.Use(workspaceAgentInfo)
-				r.Get("/rpc", api.workspaceAgentRPC)
+				r.Group(func(r chi.Router) {
+					r.Use(
+						// Override the request_type for agent rpc traffic.
+						httpmw.WithStaticProfilingLabels(pprof.Labels(pproflabel.RequestTypeTag, "agent-rpc")),
+					)
+					r.Get("/rpc", api.workspaceAgentRPC)
+				})
 				r.Patch("/logs", api.patchWorkspaceAgentLogs)
 				r.Patch("/app-status", api.patchWorkspaceAgentAppStatus)
 				// Deprecated: Required to support legacy agents