twister: Always change skip to error on integration platforms

Before only with --integration such skips were changed to errors.
This hinders issues when twister is call with --all flag in CI
and new skips on integration platforms are not caught. Then those
skips cause errors in other PRs when --integration was used.

Signed-off-by: Maciej Perkowski <Maciej.Perkowski@nordicsemi.no>

scripts/pylib/twister/twisterlib/testplan.py

@@ -1016,8 +1016,8 @@ def _create_build_dir_link(self, links_dir_path, instance):
 
 
 def change_skip_to_error_if_integration(options, instance):
-    ''' If integration mode is on all skips on integration_platforms are treated as errors.'''
-    if options.integration and instance.platform.name in instance.testsuite.integration_platforms \
+    ''' All skips on integration_platforms are treated as errors.'''
+    if instance.platform.name in instance.testsuite.integration_platforms \
         and "quarantine" not in instance.reason.lower():
         # Do not treat this as error if filter type is command line
         filters = {t['type'] for t in instance.filters}