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/backendplugin/instrumentation/instrumentation.go

@@ -12,6 +12,7 @@ import (
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/infra/tracing"
 	"github.com/grafana/grafana/pkg/plugins/backendplugin"
+	plog "github.com/grafana/grafana/pkg/plugins/log"
 )
 
 var (
@@ -29,7 +30,7 @@ var (
 	}, []string{"plugin_id", "endpoint", "target"})
 )
 
-var logger log.Logger = log.New("plugin.instrumentation")
+var logger = plog.New("plugin.instrumentation")
 
 // instrumentPluginRequest instruments success rate and latency of `fn`
 func instrumentPluginRequest(ctx context.Context, cfg Cfg, pluginCtx *backend.PluginContext, endpoint string, fn func() error) error {