epiphany: upgrade 43.1 -> 44.5

epiphany: upgrade 43.1 -> 44.5

With this version, epiphany has transitioned to gtk4,
and requires webkit built with gtk4 support (there is no choice,
it's a hard break). Adjust the webkit recipe accordingly.

There's also a new requirement for gcr 4.x and libadwaita.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>