refactor(GPU): refactor to colocate and simplify UI work [EE-5127] (#8593)

* refactor to colocate and simplify

* fix(insights): text size to match portainer views

---------

Co-authored-by: testa113 <testa113>

app/react/docker/host/SetupView/GpusInsights.tsx

@@ -0,0 +1,29 @@
+import { InsightsBox } from '@@/InsightsBox';
+
+export function GpusInsights() {
+  return (
+    <InsightsBox
+      content={
+        <>
+          <p>
+            From 2.18 on, the set-up of available GPUs for a Docker Standalone
+            environment has been shifted from Add environment and Environment
+            details to Host -&gt; Setup, so as to align with other settings.
+          </p>
+          <p>
+            A toggle has been introduced for enabling/disabling management of
+            GPU settings in the Portainer UI - to alleviate the performance
+            impact of showing those settings.
+          </p>
+          <p>
+            The UI has been updated to clarify that GPU settings support is only
+            for Docker Standalone (and not Docker Swarm, which was never
+            supported in the UI).
+          </p>
+        </>
+      }
+      header="GPU settings update"
+      insightCloseId="gpu-settings-update-closed"
+    />
+  );
+}