[feat][report-converter] Add support for bug path positions (for arrows)

sarif files contain all the information required to construct the arrows.
This commit extracts that information and uses it in the report.

tools/report-converter/codechecker_report_converter/report/parser/sarif.py

@@ -143,26 +143,30 @@ def _process_code_flows(
 
         thread_flow_info = ThreadFlowInfo()
 
-        # TODO: Currently, we only collect bug path events.
-
         for code_flow in result.get("codeFlows", []):
             for thread_flow in code_flow.get("threadFlows", []):
                 for location_data in thread_flow["locations"]:
-                    # There are a lot data stored alongside the location worth
+                    if "location" not in location_data:
+                        continue
+
+                    # There is a lot data stored alongside the location worth
                     # parsing, but we only need the actual location now.
                     location = location_data["location"]
 
+                    file, rng = self._process_location(location)
+                    if not (file and rng):
+                        continue
+
+                    thread_flow_info.bug_path_positions.append(
+                        BugPathPosition(file, rng)
+                    )
+
                     if "message" not in location:
-                        # TODO: This might be a bug path position (for arrows).
                         continue
 
                     message = self._process_message(
                         location["message"], rule_id, rules)
 
-                    file, rng = self._process_location(location)
-                    if not (file and rng):
-                        continue
-
                     thread_flow_info.bug_path_events.append(BugPathEvent(
                         message, file, rng.start_line, rng.start_col, rng))