Add variable to control whether typing attributes should be recalculated when deleting backward

[fluiddot]

Related to Gutenberg PR: WordPress/gutenberg#37676

The purpose of this PR is allowing to control whether the typing attributes should be recalculated when deleting backward, this will be handy when we want typing attributes/text format to be fully controlled by other libraries, therefore prevent that Aztec modifies them.

Additionally, there's a comment in the recalculateTypingAttributes function that states the following (reference):

/// Only call this method when sure that the typingAttributes need to be recalculated.  Keep in mind that
/// recalculating the typingAttributes in the wrong moment can cause trouble (for example reverting a decision
/// by the user to turn a style off).

If the recalculation only should happen in specific cases, this aligns with the idea of giving control over whether to recalculate the typing attributes through a variable.

To test:
This change shouldn't modify the current behavior when deleting text, so we should only verify that deleting backward works as expected.

[guarani]

Change looks good to me! I see that you're not calling recalculateTypingAttributes in Gutenberg, but calling it (as was done previously) when Aztec is used outside of Gutenberg. It all seems to make sense so LGTM.