fix(hesai): correctly handle return mode when updating parameters

[mojomex]

PR Type

• Bug Fix

Description

When setting parameters during runtime, e.g. with ros2 param set, the return mode parameter was parsed with the wrong function, resulting in most return modes not being accepted. this PR fixes this.

Review Procedure

Confirm all supported return modes can be set during runtime.

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• Commits are properly organized and messages are according to the guideline
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• PR title describes the changes

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• All open points are addressed and tracked via issues or tickets

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[mojomex]

Because this is a small and obvious change, I will merge it myself 🙇