refactor(lane_change): add new structs (TransientData) to store commonly used values

[zulfaqar-azmi-t4]

Description

This PR adds TransientData to standardize commonly used values in the lane change module, such as the current lanes' buffer and the distance to the terminal start and end. The goal is to ensure consistency when calculating limits and lengths.

Related links

Parent Issue:

• None

How was this PR tested?

1. Build complete
2. PSIM
3. Scenario Test TBD

Notes for reviewers

None.

Interface changes

None.

Effects on system behavior

None.

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[zulfaqar-azmi-t4]

Due to some computational issue, I will set this PR to draft.

[zulfaqar-azmi-t4]

close as I will open another PR.