project.ignore doesn't work with inotify

Does the buck2 daemon using inotify honor the project.ignore setting? My .buckconfig file contains:

```
[project]
ignore = ext
```

The ext directory contains 3rd party files (headers and libraries) that are used as dependencies and is very large (100k+ files). We treat these as system files and don't need to track changes to those files. Running buck2 runs into the system `fs.inotify.max_user_watches` limit. Output:

```
>buck2 targets //...
Build ID: d38e98b1-262a-45e8-ac69-1c1dcc4bb097
Error initializing DaemonStateData

Caused by:
0: Error creating a FileWatcher for project root `<>/dev`
1: Creating notify file watcher
2: OS file watch limit reached. about ["<>/dev/ext/boost_1_71_0/src/boost_1_71_0/boost/phoenix/core/detail"]
Build ID: d38e98b1-262a-45e8-ac69-1c1dcc4bb097
Jobs completed: 0. Time elapsed: 0.0s.
```
Note that the error message shows that the problem is with the "ext" directory which should have been ignored. Removing the directory makes the failure go away.