Display value of Logs includes the string "(UTF8) " or "(Base64 encoded) "

CLI displays the content of `topic` and `value` of Logs as either UTF8 string or Base64url encoded string.

But this information is also included as part of the value, which can be misleading.

e.g. 

```text
"topic": "(Base64 encoded) AAAAAA"
```

It seems that the value also contains the part "(Base64 encoded) " which is not true.

It is suggested to avoid this display method.

