[v13.0.0-beta.2] Toast displayed when pressing Enter on block gives incorrect guidance in RTL

[gonfunko]

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Description

When a block is focused and Enter is pressed, a toast prompting the user to use the right arrow key to navigate the block is shown. In RTL workspaces, this will do nothing, as the left arrow key needs to be used to navigate the block.

Reproduction steps

1. Open an RTL Blockly workspace
2. Focus a block and hit Enter
3. Observe that the toast tells you to use the right arrow key to navigate the block, which is a no-op.