feat: replace deprecated fx.Extract function by fx.Populate

This literally does nothing in our case, the only different between them 
is that Populate supports embeds while Extract doesn't.

However Extract is deprecated and this anoys staticcheck which makes CI 
fail.

core/builder.go

@@ -84,7 +84,7 @@ func NewNode(ctx context.Context, cfg *BuildCfg) (*IpfsNode, error) {
 			return nil, fmt.Errorf("building fx opts: %w", err)
 		}
 	}
-	opts = append(opts, fx.Extract(n))
+	opts = append(opts, fx.Populate(n))
 
 	app := fx.New(opts...)