fix: broken build on Mac
On Mac:
```
--> components/file_system/src/rate_limiter.rs:5:5
5 | use crossbeam_utils::CachePadded;
|     ^^^^^^^^^^^^^^^ use of undeclared crate or module `crossbeam_utils`
```
### Release note
* None
@@ -10,6 +10,7 @@ bcc-iosnoop = ["bcc"]
[dependencies]
collections = { path = "../collections" }
crc32fast = "1.2"
+crossbeam-utils = "0.8.0"
fs2 = "0.4"
lazy_static = "1.3"
libc = "0.2"
@@ -21,7 +22,6 @@ tikv_alloc = { path = "../tikv_alloc" }
tikv_util = { path = "../tikv_util" }
variant_count = "1.0.0"
-
[dev-dependencies]
rand = "0.7"
tempfile = "3.0"
@@ -29,4 +29,4 @@ maligned = "0.2.1"
[target.'cfg(target_os = "linux")'.dependencies]
bcc = { version = "0.0.30", optional = true }
-crossbeam-utils = "0.8.0"
+
