Upgrade gRPC and OpenTelemetry packages for compatibility (#2003)

Upgrades `go.opentelemetry.io/otel` from version` v1.11.1` to `v1.26.0`. The upgrade addresses compatibility issues caused by the removal of several sub-packages in the latest OpenTelemetry release, which were causing broken dependencies.

**Key Changes:**
- Upgraded `go.opentelemetry.io/otel` from `v1.11.1` to `v1.26.0`.

- Fixed broken dependencies by replacing the deprecated sub-packages:
  - `go.opentelemetry.io/otel/metric/instrument`
  - `go.opentelemetry.io/otel/metric/instrument/asyncint64`
  - `go.opentelemetry.io/otel/metric/instrument/syncint64`
  
- Upgraded `google.golang.org/grpc` from `v1.56.3`  to `v1.64.0` which deprecate `Dial` and `DialContext` to `NewClient`.

management/server/testutil/store.go

@@ -0,0 +1,45 @@
+//go:build !ios
+// +build !ios
+
+package testutil
+
+import (
+	"context"
+	"os"
+	"time"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/testcontainers/testcontainers-go"
+	"github.com/testcontainers/testcontainers-go/modules/postgres"
+	"github.com/testcontainers/testcontainers-go/wait"
+)
+
+func CreatePGDB() (func(), error) {
+	ctx := context.Background()
+	c, err := postgres.RunContainer(ctx,
+		testcontainers.WithImage("postgres:alpine"),
+		postgres.WithDatabase("test"),
+		postgres.WithUsername("postgres"),
+		postgres.WithPassword("postgres"),
+		testcontainers.WithWaitStrategy(
+			wait.ForLog("database system is ready to accept connections").
+				WithOccurrence(2).WithStartupTimeout(15*time.Second)),
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	cleanup := func() {
+		timeout := 10 * time.Second
+		err = c.Stop(ctx, &timeout)
+		if err != nil {
+			log.Warnf("failed to stop container: %s", err)
+		}
+	}
+
+	talksConn, err := c.ConnectionString(ctx)
+	if err != nil {
+		return cleanup, err
+	}
+	return cleanup, os.Setenv("NETBIRD_STORE_ENGINE_POSTGRES_DSN", talksConn)
+}