Add madmin package context support (#9172)

This is to improve responsiveness for all
admin API operations and allowing callers
to cancel any on-going admin operations,
if they happen to be waiting too long.

cmd/logger/message/log/entry.go

@@ -50,3 +50,11 @@ type Entry struct {
 	Message      string `json:"message,omitempty"`
 	Trace        *Trace `json:"error,omitempty"`
 }
+
+// Info holds console log messages
+type Info struct {
+	Entry
+	ConsoleMsg string
+	NodeName   string `json:"node"`
+	Err        error  `json:"-"`
+}