Introduce Golang-based benchmarking utility (#769)

* Introduce Golang-based benchmarking utility

* benchmark fio: properly configure logger level

* benchmark: properly terminate on Ctrl+C when initializing/running Tart

* benchmark(fio): increase runtime to 30 seconds

* benchmark(fio): IOPS are already per second

* benchmark(fio): --numjobs 1 --iodepth 1 --end_fsync 1

* benchmark(README.md): add results

benchmark/internal/executor/executor.go

@@ -0,0 +1,11 @@
+package executor
+
+import (
+	"context"
+)
+
+type Executor interface {
+	Name() string
+	Run(ctx context.Context, command string) ([]byte, error)
+	Close() error
+}