fix(annotations): Fix annotation region in mobile

[marcoartaviaq]

Fix the creation of annotation regions when enableAnnotationsDiscoverability is set to false. When enableAnnotationsDiscoverability is true, the class bp-annotations-discoverable is added. This class sets pointer-events: none on the.textLayerelement (see source) to prevent the text layer from intercepting pointer events intended for the region creator. This PR introduces pointer-events: none to the .textLayer element when the region creation button is enabled (this causes the class bp-annotations-create--region to be added), allowing users to comment by region even when discoverability is disabled.

Behavior before the update:

region-annotations-before.mp4

Behavior after the update:

region-annotations-safari-mobile.mp4

Behavior in other non mobile browsers:

Firefox:

region-annotations-firefox.mp4

Chrome:

region-annotations-chrome.mp4

Safari:

region-annotations-safari.mp4

Edge:

region-annotations-edge.mp4

[bfoxx1906]

Fix makes sense. Approving. Let's just make sure that we do regression testing for annotation creation on the other browsers in a non-mobile context as well.