add context to table header/footer label

[timse201]

Description

For German, we translate the table like a human body. Header -> head, body -> body, footer -> foot. Right now, there is no conflict in core. But header and footer are common words. So there could be a conflict in the future. Better safe than sorry.

Step-by-step reproduction instructions

edit a table

Screenshots, screen recording, code snippet

No response

Environment info

No response

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure