fix(autoware_behavior_path_planner_common): fix shadowArgument warning

[veqcc]

Description

This is a fix based on cppcheck shadowArgument warning

planning/behavior_path_planner/autoware_behavior_path_planner_common/src/utils/drivable_area_expansion/static_drivable_area.cpp:748:21: style: Local variable 'lanes' shadows outer argument [shadowArgument]
  for (const auto & lanes : shorten_lanes) {
                    ^
planning/behavior_path_planner/autoware_behavior_path_planner_common/src/utils/drivable_area_expansion/static_drivable_area.cpp:690:61: note: Shadowed declaration
  PathWithLaneId & path, const std::vector<DrivableLanes> & lanes)
                                                            ^
planning/behavior_path_planner/autoware_behavior_path_planner_common/src/utils/drivable_area_expansion/static_drivable_area.cpp:748:21: note: Shadow variable
  for (const auto & lanes : shorten_lanes) {
                    ^

Since this is just to avoid shadowArgument, if you come up with more suitable word, please tell me!

Tests performed

Not applicable.

Effects on system behavior

Not applicable.

Interface changes

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[go-sakayori]

LGTM