perf(utils): Add timeout to utils::exec_cmd (#2171)

* perf(utils): Add timeout to `utils::exec_cmd`

This adds a timeout to any command executed using the `utils::exec_cmd`.
The initial time limit is hard coded to 500ms but if required we can
make this configurable. Have also switched the tests to be a bit more
granular on which systems they are ignored.

* Terminate the processes if they timeout

Cargo.lock

@@ -559,9 +559,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.81"
+version = "0.2.82"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1482821306169ec4d07f6aca392a4681f66c75c9918aa49641a2595db64053cb"
+checksum = "89203f3fba0a3795506acaad8ebce3c80c0af93f994d5a1d7a0b1eeb23271929"
 
 [[package]]
 name = "libdbus-sys"
@@ -928,6 +928,17 @@ dependencies = [
  "unicode-xid 0.2.1",
 ]
 
+[[package]]
+name = "process_control"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9cac0d971172c65b01208ef9567f52892fc89b1c4530c50e997c6f29da7ee961"
+dependencies = [
+ "crossbeam-channel",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "quick-xml"
 version = "0.20.0"
@@ -1281,6 +1292,7 @@ dependencies = [
  "path-slash",
  "pest",
  "pest_derive",
+ "process_control",
  "quick-xml",
  "rand 0.8.2",
  "rayon",