[424422] Correct migration to handle all FontFormat typed features

All features typed by FontFormat have been modified, in all dialects. A
single migration participant is sufficient.

The previous Table specific participant has been deleted as it never
migrated the TableElementStyle nor the ForegroundStyleDescription which
are now covered by the core participant.

Bug: 424422
Change-Id: Icb53328389d7abb2e5feff1571a311f7e34d3007
Signed-off-by: Maxime Porhel <maxime.porhel@obeo.fr>
3 files changed