Toyota: use platform config

[sshane]

We should think more about grouping, it's nice that you can do that outside the enum creation for stuff like DBCs, common specs, and alike ADAS platforms. Now, you'll have to grep to find common platform details.

Do we want to completely get rid of sets/grouping? This seems like a slight regression for readability.

One change we can make is utilize __post_init__ like we do for the CarInfo, however since everything is in CAR, CAR won't exist yet while initializing the configs. We can use a nonstandard init function and call it later but that doesn't seem that nice

[jnewb1]

One thing I was thinking was using the "or" syntax, like

COROLLA = TSS2_CAR | PlatformConfig(
   ...
)

So you can skip anything set in TSS2_CAR