fix(lanelet2_map_validator): restore missing intersection lane and removed unnecessary linestrings from intersection test maps

[TaikiYamada4]

Description

I found that one of the intersection lanes were removed by accident.
This PR restores that lane and removed unnecessary linestrings from intersection test maps.

The left figure is the current basic_intersection_area.osm. The red rectangle implies the missing lane.
The right figure is the one fixed in this PR.

How was this PR tested?

Checked that following command runs without errors.

colcon test --packages-select autoware_lanelet2_map_validator --event-handlers console_cohesion+

Notes for reviewers

The two maps below have large changes since they were not made from vector map builder but have been edited through vector map builder in this PR.

• basic_intersection_area.osm
• intersection_area_with_wrong_orientation.osm

Effects on system behavior

None.

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