agent-ctl: fix the compile error

When the version of libc is upgraded to 0.2.145, older getrandom could not adapt
to new API, and this will make agent-ctl fail to compile.

We upgrade the version of `rand`, so the low version of getrandom will no longer
need.

Fixes: #7032

Signed-off-by: Yushuo <y-shuo@linux.alibaba.com>

src/tools/kata-ctl/Cargo.lock

@@ -764,7 +764,6 @@ dependencies = [
  "lazy_static",
  "num_cpus",
  "oci",
- "proc-mounts",
  "regex",
  "safe-path",
  "serde",
@@ -1047,15 +1046,6 @@ dependencies = [
  "winapi",
 ]
 
-[[package]]
-name = "partition-identity"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fa925f9becb532d758b0014b472c576869910929cf4c3f8054b386f19ab9e21"
-dependencies = [
- "thiserror",
-]
-
 [[package]]
 name = "percent-encoding"
 version = "2.2.0"
@@ -1129,15 +1119,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "proc-mounts"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d652f8435d0ab70bf4f3590a6a851d59604831a458086541b95238cc51ffcf2"
-dependencies = [
- "partition-identity",
-]
-
 [[package]]
 name = "prost"
 version = "0.8.0"