Table cells are shifted when media is embedded over multiple cells

[michalbilik]

📝 Provide detailed reproduction steps (if any)

1. Open classic editor example.
2. Create a table, or use example table:

editor.setData('<figure class="table"><table><tbody><tr><td>1</td><td>2</td><td>3</td></tr><tr><td>4</td><td>5</td><td>6</td></tr><tr><td>7</td><td>8</td><td>9</td></tr></tbody></table></figure>')

3. Select any two cells within the table.
4. Paste media content (e.g., a YouTube video link) using CMD + V.

✔️ Expected result

The media content should be embedded either in the first selected cell or in all cells that are chosen.

❌ Actual result

The media content is not embedded, and cells are shifted.

Screen.Recording.2023-12-07.at.12.58.03.mov

📃 Other details

This behaviour was introduced in v34.0.0, but in v33.0.0 same steps crashed the table.

Might be related to #3224.

• Browser: All
• OS: macOS
• First affected CKEditor version: v34.0.0

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