Support values requiring evaluation in with modifiers

[tsandall]

Today you must assign values requiring evaluation to local variables before using them in with modifiers. For example, the following is not allowed:

foo = {"bar": 1}; data.foo with input as foo.bar

The easiest way to handle this would be to rewrite the with modifiers early in compilation the same way we do for rule heads, comprehension terms, etc.

So, for example, the query above would become:

foo = {"bar": 1}; __local0__ = foo.bar; data.foo with input as __local0__