feat(autoware_behavior_path_side_shift_module): add parameters of limitations to the side shift

[TaikiYamada4]

Description

This PR updates default launch parameters for the behavior path side_shift module so they stay in sync with autowarefoundation/autoware_universe#12233.

Parameters added

Parameter	Default	Role
max_shift_magnitude	1.0 [m]	Upper bound on absolute lateral shift for safety.
min_shift_gap	0.001 [m]	Ignores shifts smaller than this gap vs. previous offset (avoids tiny/noisy path changes).
unit_shift_amount	0.1 [m]	Step size when using directional shift mode (LEFT / RIGHT) via the SetLateralOffset service.

Related PRs

• Implementation and interface: autowarefoundation/autoware_universe#12233
• Service definition: tier4/tier4_autoware_msgs#210

How was this PR tested?

• Verified the YAML loads without error when included by the behavior path planner / side_shift launch chain.
• See the video attached in autowarefoundation/autoware_universe#12233 to see how it's working.

Notes for reviewers

None.

Effects on system behavior

The default behavior of the side_shift module will change that the maximum shift size will be capped.

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