feat(button-group): update button group styles and implement new properties (#17178)

* feat(button-group): update button group styles and implement new properties

* feat(button-group): update button group styles

* fix(button-group): fix z-indexes

* feat(button-group): update active states and z-indexes

* chore(deps): bump theming version

---------

Co-authored-by: Marin Popov <desig9stein@users.noreply.github.com>

Author: didimmova

package-lock.json

@@ -82,7 +82,7 @@
     "express": "^5.2.1",
     "fflate": "^0.8.1",
     "igniteui-i18n-core": "^1.0.2",
-    "igniteui-theming": "^25.0.3",
+    "igniteui-theming": "^25.2.0",
     "igniteui-trial-watermark": "^3.1.0",
     "jspdf": "^4.2.1",
     "lodash-es": "^4.17.21",