convert uses of interface{} to any

Done via:
  find . -name "*.go" | xargs sed -i -E 's/interface\{\}/any/g'

PiperOrigin-RevId: 487033228

pkg/sentry/fsimpl/overlay/filesystem.go

@@ -53,7 +53,7 @@ func (fs *filesystem) Sync(ctx context.Context) error {
 }
 
 var dentrySlicePool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		ds := make([]*dentry, 0, 4) // arbitrary non-zero initial capacity
 		return &ds
 	},