Parity issue: Pitcher plant hitbox size

Discovered while testing MC-262417.

The bug

In Java Edition, the hitbox for pitcher plants covers a full cube. However, in Bedrock Edition, the hitbox is more appropriate for the block's actual size, allowing for the block below it to be targeted.

This is also an internal parity issue - the pitcher plant as a crop has an appropriate size, but as a flower it does not.

How to reproduce

1. Place a pitcher plant (knowing the size of the block below it
2. Try to target the block the pitcher plant is on from above

Expected results

You should be able to do it.

Actual results

The plant's hitbox is simply too big.