Run modernize (#21546)

`go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix -test ./...` executed.

`go generate ./...` ran afterwards to keep generated.

internal/rest/client.go

@@ -458,10 +458,7 @@ func exponentialBackoffWait(r *rand.Rand, unit, maxSleep time.Duration) func(uin
 			attempt = 16
 		}
 		// sleep = random_between(unit, min(cap, base * 2 ** attempt))
-		sleep := unit * time.Duration(1<<attempt)
-		if sleep > maxSleep {
-			sleep = maxSleep
-		}
+		sleep := min(unit*time.Duration(1<<attempt), maxSleep)
 		sleep -= time.Duration(r.Float64() * float64(sleep-unit))
 		return sleep
 	}