simplify main test workflow - do not run test_FMIRegression

Author: syntron

.github/workflows/Test.yml

@@ -73,7 +73,7 @@ jobs:
           verbose: true
           emoji: true
           job-summary: true
-          custom-arguments: '-v '
+          custom-arguments: '-v  --ignore=./tests/test_FMIRegression.py  --ignore=./tests_v400/test_FMIRegression.py'
           click-to-expand: true
           report-title: 'Test Report'