ci: set path to include qt dlls folder

Author: markoburcul

ci/Jenkinsfile.tests-e2e.windows

@@ -71,8 +71,8 @@ pipeline {
     STATUS_RUNTIME_WS_API = 'False'
 
     /* Avoid race conditions with other builds using virtualenv. */
-    VIRTUAL_ENV = "${WORKSPACE_TMP}/venv"
-    PATH = "${VIRTUAL_ENV}/bin:${PATH}"
+    VIRTUAL_ENV = "${WORKSPACE_TMP}\\venv"
+    PATH = "${VIRTUAL_ENV}\\bin;C:\\Qt\\6.9.0\\msvc2022_64\\bin;${PATH}"
 
     /* To store user configuratiin files in temp dir */
     XDG_CONFIG_HOME = "${WORKSPACE_TMP}/config"