feat(studio): enable functions counter on Home for self-hosted environments (#42992)

Feature

## What is the current behavior?

The Functions counter on the Home page is only displayed in platform
environments.
In self-hosted setups, the counter is hidden due to a platform guard,
even though Functions may be available.

## What is the new behavior?

The Functions counter is now also displayed in self-hosted environments.

This is now possible thanks to the following PRs:

- #40690  
- #42322  
- #42349  
- #42350  

These PRs introduce and enable the API required for listing Functions in
Studio, making it feasible to show the Functions count outside of the
platform environment.

## Additional context

Related issues: #36285

This change removes the platform-only restriction around the Functions
card in the Home interface, allowing feature parity between platform and
self-hosted deployments where the Functions API is available.

---------

Co-authored-by: Andrey A. <56412611+aantti@users.noreply.github.com>
Co-authored-by: Charis Lam <26616127+charislam@users.noreply.github.com>

apps/studio/components/interfaces/Home/Home.tsx

@@ -167,21 +167,19 @@ export const Home = () => {
                     )}
                   </div>
 
-                  {IS_PLATFORM && (
-                    <div className="flex flex-col gap-y-1">
-                      <Link
-                        href={`/project/${ref}/functions`}
-                        className="transition text-foreground-light hover:text-foreground text-sm"
-                      >
-                        Functions
-                      </Link>
-                      {isLoadingFunctions ? (
-                        <ShimmeringLoader className="w-full h-[32px] w-6 p-0" />
-                      ) : (
-                        <p className="text-2xl tabular-nums">{functionsCount}</p>
-                      )}
-                    </div>
-                  )}
+                  <div className="flex flex-col gap-y-1">
+                    <Link
+                      href={`/project/${ref}/functions`}
+                      className="transition text-foreground-light hover:text-foreground text-sm"
+                    >
+                      Functions
+                    </Link>
+                    {isLoadingFunctions ? (
+                      <ShimmeringLoader className="w-full h-[32px] w-6 p-0" />
+                    ) : (
+                      <p className="text-2xl tabular-nums">{functionsCount}</p>
+                    )}
+                  </div>
 
                   {IS_PLATFORM && (
                     <div className="flex flex-col gap-y-1">