Logging spawner load errors (+ number of vehicle classes in categories)

[dijksterhuis]

simple solution for mitigating some pain points with vehicle spawners

• too many classes (not enough tag filtering) makes spawner non functional
• only way to see how many classes over the limit is to load in and walk up to a spawner as a player

working this stuff out would be easier with some server side logging lines emitted when loading the vehicle spawner configurations

• number of vehicle class names per category
• a specific error log when it exceeds the maximum possible classes per category [0]

should make it a bit easier to detect when a vehicle spawner is borked, hopefully.

could also skip the last Nx entries from a tag generated array of class names (force the limit to 8 classes). but that starts hiding breakage which i'm not really a fan of.

[0]: 8 options i believe because of default earplugs and scout options in wheel menu?