Add tracing to settings service.

This adds tracing to the settings service. It uses the otelchi package
and passes the tracing provider to the grpc and http servers.

services/settings/pkg/service/v0/instrument.go

@@ -1,13 +0,0 @@
-package svc
-
-import (
-	"github.com/owncloud/ocis/v2/services/settings/pkg/metrics"
-)
-
-// NewInstrument returns a service that instruments metrics.
-func NewInstrument(next Service, metrics *metrics.Metrics) Service {
-	return Service{
-		manager: next.manager,
-		config:  next.config,
-	}
-}

services/settings/pkg/service/v0/logging.go

@@ -1,13 +0,0 @@
-package svc
-
-import (
-	"github.com/owncloud/ocis/v2/ocis-pkg/log"
-)
-
-// NewLogging returns a service that logs messages.
-func NewLogging(next Service, logger log.Logger) Service {
-	return Service{
-		manager: next.manager,
-		config:  next.config,
-	}
-}

services/settings/pkg/service/v0/tracing.go

@@ -1,9 +0,0 @@
-package svc
-
-// NewTracing returns a service that instruments traces.
-func NewTracing(next Service) Service {
-	return Service{
-		manager: next.manager,
-		config:  next.config,
-	}
-}