Remove the loading of asset maintenances that are not used by view

[marcusmoore]

Description

In the process of debugging #12934 I noticed that we load asset maintenances and pass them to the view but the table that is rendered in that view doesn't use them and instead hits the api. This PR skips loading those models in the controller and let's the table/api do its thing.

I did some very quick testing on this and it seems good. I can test more thoroughly on Monday unless someone with more confidence merges it first 😉

Fixes #12934

Type of change

• Bug fix (non-breaking change which fixes an issue)

[what-the-diff]

PR Summary

• Added defaultLoc to asset_maintenances
  This improvement adds a "defaultLoc" field to asset maintenance items, providing better organization and clarity for users.
• Removed unused code from getAssetMaintenancesReport()
  This change cleans up and optimizes the code, ensuring that only relevant and necessary elements are present in the getAssetMaintenancesReport() function.