Feat: Adds max limit to row span and column span in grid.

[vipul0425]

What?

Fixes: #63967

Why?

There was no maximum limit set for row span and column span, allowing users to set values larger than the actual number of rows or columns.

How?

It calculates the max column and row span based on the columns/row count and current position.

Testing Instructions

1. Adds the grid block.
2. Insert any block into it example image block.
3. Try to increase/decrease the row/column span in the style tab of the block. It should not exceed the max columns/rows.

Screenshots or screencast

Screen.Recording.2024-08-29.at.2.31.25.PM.mov

[github-actions]

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[github-actions]

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Co-authored-by: vipul0425 <vipulgupta003@git.wordpress.org>
Co-authored-by: noisysocks <noisysocks@git.wordpress.org>

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