feat(content): add vehiclepart raincatcher

[chaosvolt]

Purpose of change

This adds the option to use tarp raincatchers on vehicles, the only other vanilla funnel option besides gutters (which aren't exactly portable) to not have a vehiclepart option.

Describe the solution

1. Added a vehiclepart version of tarp raincatcher. Since collection power is all in liters, used 90 instead of the jank-ass volume value the trap version used.
2. But for consistency, bumped the value the trap version can handle from 85.5 liters to 90 liters.

Describe alternatives you've considered

Mainlining leather tarp raincatchers from MST Extra too.

Testing

1. Checked affected files for syntax and lint errors.
2. Load-tested and set up two raincatchers over 60-liter tanks, one in trap form and the other a vehiclepart over an installed tank.
3. Waited...motherfucking FOREVER to finally get weather that's fucking rainy.
4. Gave up and loaded back in after temporarily editing base humidity to be higher in regional map settings because blyaaat.
5. Loaded in, found it was raining now, waited it out. The tank under the trap version had 6 units of water in it, the vehicle version only had 5.
6. Re-loaded and waited out the rain a second time, different was now 14 vs 9 units.

Given this, I'm convinced there is some fuckery going on, either randomization that needs some good solid testing, or else vehicle funnels are busted.

Additional context

Related issue: #4488

Until I do more testing I don't want to say this actually fixes that issue. Metal funnels are already still better than tarp raincatchers, so lacking tarp raincatchers doesn't seem like it'd be a magic bullet that'd fix things. Not unless the player in question just never bothered to test metal funnels on vehicles, presumably because they're a pain in the dick and have to be welded on to install, but I'd really want to test this more in case there's some hidden code fuckery going on too.

Checklist

[VissValdyr]

This reminds me. Rain is super rare. Maybe bumping it up makes sense?

Also humidity water collectors, with extra moldy smell for taste.

I wonder if we can use satellite dishes for rain collectors too, it's not like we want to watch the shopping channel rerolls all day.

[chaosvolt]

This reminds me. Rain is super rare. Maybe bumping it up makes sense?

If we can't get rain to behave sanely with current settings them maybe we should, yeah.

[VissValdyr]

Another finished one. Nice

[Unrepentant-Atheist]

Is gud shite! Is very gud shite!