Update WxT 10.3.x to latest Drupal 10 LTS

While unpinning drupal/core-recommended from 10.3.6 to ^10.3 and testing, I noticed the site was actually upgraded to 10.4.0. There was only two issues needing to be resolved before jumping to 10.4.0, which have been addressed:

• Had to re-roll a drupal/core patch from related ticket.
• Had to fix declaration of TaxonomyBreadcrumbBuilder::applies in wxt_ext_breadcrumb

After these two fixes WxT was working well on 10.4.0. These changes also got the automated tests passing in GitHub.

Changes have been pushed to 10.3.x, will wait for @sylus to review and determine if we push a 5.3.1 version for WxT LTS on Drupal 10, or if we we create a new 10.4.x for this.

Yeah this sounds good to me :)

I went with slightly tighter pinning but still allowing patch versions.

Hope that is ok but let me know if want to loosen it even more but I was worried about minor jumps.

"drupal/core-dev": "10.4.*",

@sylus yep this makes sense to me, thanks!