test: Remove backward compatibility tests for KC 22 - 24

There are some weird errors with theses versions in the tests only.
Let's the matrix tests figure out if it is still compatible.

Signed-off-by: Sven-Torben Janus <sven-torben@sven-torben.de>

.github/workflows/buildAndTest.yml

@@ -29,7 +29,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        keycloak_version: [ 22.0.5, 23.0.7, 24.0.5, 25.0.0, latest ]
+        keycloak_version: [ 25.0.0, latest ]
         keycloak_dist: [quarkus]
         experimental: [false]
         include: