accessibility/at-spi2-core: update to 2.46.0

What's new in at-spi2-core 2.46.0:
* Fix GetInterfaces documentation on org.a11y.atspi.Accessible
  interface.

What's new in at-spi2-core 2.45.91:
* Send device event controller events using the same signature as other
  events.
* Document the Accessible, Action, and Cache dbus interfaces.
* Fix license of atspi-gmain.c (#87).

What's new in at-spi2-core 2.45.90:
* xml: Add some documentation.
* xml: Fix event arguments.
* xml: Add some missing DeviceEventController methods.
* Bind the AT-SPI bus to the graphical session.
* Mark bus service as belonging to the session slice.
* Add ATSPI_ROLE_PUSH_BUTTON_MENU.
* Add an "announcement" event/signal to allow objects to send
  notifications (!63).
* Various code clean-ups and test improvements.

What's new in at-spi2-core 2.45.1:
* Atk and at-spi2-atk are now merged into this project.
* Now requires meson 0.56.2 and glib 2.67.4.
* at-spi2-atk: Expose the accessible hierarchy via dbus introspection.
* Properly escape the AT-SPI bus address; fixes warnings about the address
  not containing a colon (!55).
* Add a text value to AtspiValue, so that a value can expose a textual
  description, as in the new Atk value API.
* Add atspi_event_listener_register_with_app, to allow an event listener
  to be registered only for a given application (!52).

- accessibility/atk and accessibility/at-spi2-atk have been merged into
  accessibility/at-spi2-core

- accessibility/at-spi2-core: bump consumers of removed ports atk and at-spi2-atk

PR:		269704
Exp-run by:	antoine
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