fix(logcollector): silent errors from saving of schema details

Silent collection schema details failure.
Now it fails in the K8S test. Need be fixed later

(cherry picked from commit c177a65)

# Conflicts:
#	sdcm/tester.py

sdcm/tester.py

@@ -2946,6 +2946,17 @@ def clean_resources(self):
 
         self.destroy_credentials()
 
+    @silence(name='Save node schema')
+    def save_nodes_schema(self):
+        if self.db_cluster is None:
+            self.log.info("No nodes found in the Scylla cluster")
+
+        self.log.info("Save nodes user schema in the files")
+        for node in self.db_cluster.nodes:
+            node.save_cqlsh_output_in_file(cmd="desc schema", log_file="schema.log")
+            node.save_cqlsh_output_in_file(cmd="select JSON * from system_schema.tables",
+                                           log_file="system_schema_tables.log")
+
     def tearDown(self):
         self.teardown_started = True
         with silence(parent=self, name='Sending test end event'):