feat(shim): invoke local turbo version via npx if not installed (#8385)

### Description

I highly recommend reviewing the first 4 commits on their own as they
are primarily breaking up the massive `shim` module.

This PR adds fallback option when global turbo doesn't find a local
turbo install. If a local install isn't found we will look at:
 - lockfiles
 - package.json
 - turbo.json to identify if turbo 1 is expected

If one of those result in finding a version of `turbo`, then we'll
invoke `turbo` via `npx` to download the correct version on the fly.

This behavior can be disabled with by setting
`TURBO_DOWNLOAD_LOCAL_DISABLED` to `1` or `true`

### Testing Instructions

Added unit tests for detection behavior.

Manual testing of repos with/without a local install of `turbo`.

crates/turborepo-lib/fixtures/local_config/turbo.v1.json

@@ -0,0 +1,6 @@
+{
+ // some comments
+ "pipeline": {
+ "build": {"dependsOn": ["^build"]}
+ }
+}

crates/turborepo-lib/fixtures/local_config/turbo.v2.json

@@ -0,0 +1,6 @@
+{
+ // some comments
+ "tasks": {
+ "build": {"dependsOn": ["^build"]}
+ }
+}

crates/turborepo-lib/src/engine/builder.rs

@@ -579,6 +579,10 @@ mod test {
  fn global_change(&self, _other: &dyn Lockfile) -> bool {
  unreachable!()
  }
+
+ fn turbo_version(&self) -> Option<String> {
+ None
+ }
  }
 
  struct MockDiscovery;