JS: Migrate to new *Query.qll convention for files only to be imported by queries

[asgerf]

Adopts the convention that files defining a data-flow configuration should end with Query.qll, and such files should only be imported from .ql files. The last part is already enforced by a PR check.

To be consistent with other languages, these library files no longer wrap their contents in a module. So the new way to import the file is:

import semmle.javascript.security.dataflow.Foo::Foo // before
import semmle.javascript.security.dataflow.FooQuery // after

For backwards compatibility, the original file is still there, with a deprecated module alias pointing to the new file.

[erik-krogh]

I checked a few, and they looked fine.
I assume the rest are good as well.