[Feature request][Phoenix] "Go to definition" not working for identifier inside tuple with explicit parent module name

### Environment

* Elixir & Erlang versions (elixir --version): 1.16.2 (compiled with Erlang/OTP 26)
* Elixir Language Server version: 0.21.3
* Operating system: macOS
* Editor or IDE name (e.g. Emacs/VSCode): VSCode
* Editor Plugin/LSP Client name and version: ElixirLS (v0.21.3)

### Current behavior

Hi all, I searched through for similar issues and couldn't find one so apologies if I missed it.

When running the `phx.gen.auth` Phoenix generator, in the `router.ex` file I noticed that I wasn't able to jump to definition for the `PentoWeb.UserAuth` module in the code seen below:

However, when I omitted the module name and changed it to just `UserAuth`, ElixirLS was able to provide a hyperlink that points me correctly to the module definition.

This seems to be confined to identifiers in tuples because in other parts of the code (see below), it works just fine.

### Expected behavior

ElixirLS should know how to jump to definition if the module name is explicitly provided on an identifier inside a tuple.