Revert "Use OTP28/Elixir 1.18 in Selenium tests"

This reverts commit 988e821.

Author: mkuratczyk

.github/workflows/test-management-ui.yaml

@@ -22,12 +22,12 @@ jobs:
       fail-fast: false
       matrix:
         erlang_version:
-        - "28"
+        - "27.3"
         browser:
         - chrome
         include:
-        - erlang_version: "28"
-          elixir_version: 1.18.4
+        - erlang_version: "27.3"
+          elixir_version: 1.17.3
     env:
       SELENIUM_DIR: selenium
       DOCKER_NETWORK: rabbitmq_net