generate tyFromExpr for typeof static param with generic base type

[metagn]

fixes #24743, refs #24718

We cannot do this in general for any expression with generic type because the typeof logic is called for things like type Foo in:

type Foo[T] = object

proc init(_: type Foo) = discard

We also cannot use containsUnresolvedType to work around this specific case because the base type of static[auto] is not unresolved, it is a typeclass that isn't lifted to a parameter. The behavior of generating tyFromExpr is also consistent with pre-2.0, so we do this in this special case of static.