Plugins: Introduce plugin package specific logger (#62204)

* refactor

* implement with infra log for now

* undo moving

* update package name

* update name

* fix tests

* update pretty signature

* update naming

* simplify

* fix typo

* delete comment

* fix import

* retrigger

pkg/plugins/log/ifaces.go

@@ -0,0 +1,35 @@
+package log
+
+// Logger is the default logger
+type Logger interface {
+	// New returns a new contextual Logger that has this logger's context plus the given context.
+	New(ctx ...interface{}) Logger
+
+	// Debug logs a message with debug level and key/value pairs, if any.
+	Debug(msg string, ctx ...interface{})
+
+	// Info logs a message with info level and key/value pairs, if any.
+	Info(msg string, ctx ...interface{})
+
+	// Warn logs a message with warning level and key/value pairs, if any.
+	Warn(msg string, ctx ...interface{})
+
+	// Error logs a message with error level and key/value pairs, if any.
+	Error(msg string, ctx ...interface{})
+}
+
+// PrettyLogger is used primarily to facilitate logging/user feedback for both
+// the grafana-cli and the grafana backend when managing plugin installs
+type PrettyLogger interface {
+	Successf(format string, args ...interface{})
+	Failuref(format string, args ...interface{})
+
+	Info(args ...interface{})
+	Infof(format string, args ...interface{})
+	Debug(args ...interface{})
+	Debugf(format string, args ...interface{})
+	Warn(args ...interface{})
+	Warnf(format string, args ...interface{})
+	Error(args ...interface{})
+	Errorf(format string, args ...interface{})
+}