[API EPIC 4/4] Fix tests and examples (#2587)

* Empty All of the metrics dir

* Add instrument api with documentation

* Add a NoOp implementation.

* Updated to the new config standard

* Address PR comments

* This change moves components to sdk/metrics

The Moved components are:
- metric/metrictest
- metric/number
- metric/internal/registry
- metric/sdkapi

* The SDK changes necessary to satasify the new api

* This fixes the remaing tests.

* Update changelog

* refactor the Noop meter and instruments into one package.

* Renamed pkg.Instruments to pkg.InstrumentProvider

Co-authored-by: Aaron Clawson <MadVikingGod@users.noreply.github.com>

sdk/metric/controller/basic/pull_test.go

@@ -23,7 +23,6 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"go.opentelemetry.io/otel/attribute"
-	"go.opentelemetry.io/otel/metric"
 	controller "go.opentelemetry.io/otel/sdk/metric/controller/basic"
 	"go.opentelemetry.io/otel/sdk/metric/controller/controllertest"
 	"go.opentelemetry.io/otel/sdk/metric/export/aggregation"
@@ -45,7 +44,8 @@ func TestPullNoCollect(t *testing.T) {
 
 	ctx := context.Background()
 	meter := puller.Meter("nocache")
-	counter := metric.Must(meter).NewInt64Counter("counter.sum")
+	counter, err := meter.SyncInt64().Counter("counter.sum")
+	require.NoError(t, err)
 
 	counter.Add(ctx, 10, attribute.String("A", "B"))
 
@@ -83,7 +83,8 @@ func TestPullWithCollect(t *testing.T) {
 
 	ctx := context.Background()
 	meter := puller.Meter("nocache")
-	counter := metric.Must(meter).NewInt64Counter("counter.sum")
+	counter, err := meter.SyncInt64().Counter("counter.sum")
+	require.NoError(t, err)
 
 	counter.Add(ctx, 10, attribute.String("A", "B"))