Meru800bfa: update sensor_service.json thresholds

[adamcalabrigo]

Summary

Updates sensor_service.json for platform Meru800bfa.

Changes:

• Adds upper/lower thresholds for voltage sensors
• Adjusts upper thresholds for some temperature sensors
• Adds previously missing temperature sensors on the SMB FRU

Testing

Ran sensor_service on Meru800bfa and verified that all sensors are accessible.

[facebook-github-bot]

@joancaneus has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@joancaneus merged this pull request in facebook/fboss@69fa63ac00e35609483dd8c8521fb5dd1d5e0ebe.