Upgrade bitflags to v2.4.2 (#8693)

This PR upgrades our [`bitflags`](https://crates.io/crates/bitflags)
dependency to v2.4.2.

This also fixes an error that was seen when running `clippy`:

```
error: &-masking with zero
  --> crates/fsevent/src/fsevent.rs:19:1
   |
19 | / bitflags! {
20 | |   #[repr(C)]
21 | |   pub struct StreamFlags: u32 {
22 | |     const NONE = 0x00000000;
...  |
46 | |   }
47 | | }
   | |_^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bad_bit_mask
   = note: `#[deny(clippy::bad_bit_mask)]` on by default
   = note: this error originates in the macro `__impl_bitflags` which comes from the expansion of the macro `bitflags` (in Nightly builds, run with -Z macro-backtrace for more info)
```

Fixes #8681.

Release Notes:

- N/A

crates/fsevent/Cargo.toml

@@ -11,7 +11,7 @@ path = "src/fsevent.rs"
 doctest = false
 
 [dependencies]
-bitflags = "1"
+bitflags.workspace = true
 parking_lot.workspace = true
 
 [target.'cfg(target_os = "macos")'.dependencies]

crates/fsevent/src/fsevent.rs

@@ -17,6 +17,7 @@ pub struct Event {
 // Synchronize with
 // /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/FSEvents.framework/Versions/A/Headers/FSEvents.h
 bitflags! {
+  #[derive(Debug, PartialEq, Eq, Clone, Copy)]
   #[repr(C)]
   pub struct StreamFlags: u32 {
     const NONE = 0x00000000;