New tests: GTK3 platform accessibility

[Caolán McNamara]

On Tue, 2023-08-01 at 19:30 +0200, Colomban Wendling wrote:
> Hello everyone,
> 
> Platform accessibility (a11y) conformance tests for the GTK3 VCL [1] 
> have been merged a couple days ago.  This is a set of tests
> validating that the a11y exposed to the platform on Linux using the
> GTK3 VCL is coherent with the internal representation in LO.

That's pretty impressive. Not at all easy to get that bootstrapped,
very nice.