[MC-117767] gamerule command query feedback ignores gamerule sendCommandFeedback

Using /gamerule to query gamerule values ignores the gamerule setting sendCommandFeedback.

Other query commands like /time query respect this gamerule.

Set the gamerule sendCommandFeedback to false
```
/gamerule sendCommandFeedback false
```
Query a gamerule value
```
/gamerule sendCommandFeedback
```

Linked issues

Can confirm for MC 1.12.1.

Fixed in some 1.13 snapshot.

Not fixed as of 18w49a. Might go back to find exactly when it switched. No query gives output now.

Resolved as CR, feel free to find the exact fix version to re-resolve.