parser, checker: move error handling for any type to the checker to resolve parsing issues

[ttytm]

This can be a checker error. The type error during parsing causes parsing interruption and internal errors. E.g.:

// any.v
type Any = any

v fmt any.v

error: cannot use `any` type here
    1 | type Any = any
      |            ~~~

Internal vfmt error while formatting file: any.v.

similar to how type MyType = unknown_type is treated

[spytheman]

Excellent work.

[JalonSolov]

V still has any? I thought it was decided that that was going away...