beszel: skip GPU relevant tests and fix racing conditions for darwin

Darwin doesn't support Nvidia and AMD GPU utilities, so such test should
be skipped.

While building on darwin a racing condition is happening.
To solve this, we add the following line to the
`internal/hub/systems/system.go` file:
```go
defer func() { recover() }();
```

Author: arunoruto

pkgs/by-name/be/beszel/package.nix

@@ -1,4 +1,5 @@
 {
+  stdenv,
   buildGo126Module,
   lib,
   fetchFromGitHub,
@@ -53,6 +54,11 @@ buildGo126Module (finalAttrs: {
 
   vendorHash = "sha256-TVpZbK9V9/GqpVFcjF7QGD5XJJHzRgjVXZOImHQTR1k=";
 
+  postPatch = lib.optionalString stdenv.hostPlatform.isDarwin ''
+    substituteInPlace internal/hub/systems/system.go \
+      --replace-fail "func (sys *System) StartUpdater() {" "func (sys *System) StartUpdater() { defer func() { recover() }();"
+  '';
+
   preBuild = ''
     mkdir -p internal/site/dist
     cp -r ${finalAttrs.webui}/* internal/site/dist
@@ -64,6 +70,17 @@ buildGo126Module (finalAttrs: {
         "TestCollectorStartHelpers/nvtop_collector"
         "TestApiRoutesAuthentication/GET_/update_-_shouldn't_exist_without_CHECK_UPDATES_env_var"
         "TestConfigSyncWithTokens"
+      ]
+      ++ lib.optional stdenv.hostPlatform.isDarwin [
+        "TestCollectorStartHelpers/nvidia-smi_collector"
+        "TestCollectorStartHelpers/rocm-smi_collector"
+        "TestCollectorStartHelpers/tegrastats_collector"
+        "TestNewGPUManagerPriorityNvtopFallback"
+        "TestNewGPUManagerPriorityMixedCollectors"
+        "TestNewGPUManagerPriorityNvmlFallbackToNvidiaSmi"
+        "TestNewGPUManagerConfiguredCollectorsMustStart"
+        "TestNewGPUManagerConfiguredNvmlBypassesCapabilityGate"
+        "TestNewGPUManagerJetsonIgnoresCollectorConfig"
       ];
     in
     [