Migrate indexed module into new indexical crate

.github/workflows/tests.yml

@@ -3,9 +3,12 @@ name: Tests
 on:
   push:
     branches:
-      - "**"
+      - master
     tags-ignore:
       - "v*"
+  pull_request:
+    branches:
+      - master
 
 jobs:
   test:

crates/flowistry/Cargo.toml

@@ -20,7 +20,8 @@ log = "0.4"
 fluid-let = "1.0"
 cfg-if = "1.0"
 serde = {version = "1", features = ["derive"]}
-rustc_utils = "0.7.0-nightly-2023-08-25"
+rustc_utils = {version = "0.7.1-nightly-2023-08-25", features = ["indexical"]}
+indexical = { version = "0.2.2", default-features = false, features = ["rustc"] }
 
 # For local debugging
 html-escape = {version = "0.2", optional = true}

crates/flowistry/examples/example.rs

@@ -24,7 +24,7 @@ extern crate rustc_span;
 
 use std::process::Command;
 
-use flowistry::{indexed::impls::LocationOrArg, infoflow::Direction};
+use flowistry::infoflow::Direction;
 use rustc_borrowck::consumers::BodyWithBorrowckFacts;
 use rustc_hir::{BodyId, ItemKind};
 use rustc_middle::{
@@ -33,7 +33,7 @@ use rustc_middle::{
 };
 use rustc_span::Span;
 use rustc_utils::{
-  mir::borrowck_facts,
+  mir::{borrowck_facts, location_or_arg::LocationOrArg},
   source_map::spanner::{EnclosingHirSpans, Spanner},
   BodyExt, PlaceExt, SpanExt,
 };