Add icon for Okta Advanced Server Access macOS FMA (#48956)

<!-- Add the related story/sub-task/bug number, like Resolves #123, or
remove if NA -->

The Okta Advanced Server Access macOS Fleet-maintained app had no icon —
the Fleet UI fell back to the generic package icon, and the fleetdm.com
software catalog used the fallback icon.

The icon was extracted from the vendor's `ScaleFT.app` bundle inside
`ScaleFT-1.108.0.pkg` (downloaded from the URL in
`ee/maintained-apps/outputs/okta-advanced-server-access/darwin.json`;
SHA-256 verified against the manifest) and generated with
`tools/software/icons/generate-icons.sh`:

- `frontend/pages/SoftwarePage/components/icons/ScaleFt.tsx`: new icon
component.
- `frontend/pages/SoftwarePage/components/icons/index.ts`: two map
entries — `"okta advanced server access"` (matches the FMA list name)
and `"scaleft"` (matches host inventory, since the app's `CFBundleName`
is `ScaleFT` and there is no `CFBundleDisplayName`).
-
`website/assets/images/app-icon-okta-advanced-server-access-60x60@2x.png`:
128×128 PNG for the fleetdm.com software catalog (filename follows the
`app-icon-<slug>` convention used by `build-static-content.js`).

# Checklist for submitter

- [x] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements), JS
inline code is prevented especially for url redirects, and untrusted
data interpolated into shell scripts/commands is validated against shell
metacharacters.

## Testing

- [x] QA'd all new/changed functionality manually


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
  * Added a new software icon for ScaleFT/Okta Advanced Server Access.
* The icon now appears automatically when those software names are
recognized in the app.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

frontend/pages/SoftwarePage/components/icons/index.ts

@@ -796,6 +796,7 @@ import Safari from "./Safari";
 import SafeExamBrowser from "./SafeExamBrowser";
 import Sanesidebuttons from "./Sanesidebuttons";
 import Santa from "./Santa";
+import ScaleFt from "./ScaleFt";
 import ScMenu from "./ScMenu";
 import Scratch from "./Scratch";
 import Screenflick from "./Screenflick";
@@ -1709,6 +1710,7 @@ export const SOFTWARE_NAME_TO_ICON_MAP = {
   obsidian: Obsidian,
   ocenaudio: Ocenaudio,
   "ok json": OkJson,
+  "okta advanced server access": ScaleFt,
   "okta verify": OktaVerify,
   ollama: Ollama,
   omnidisksweeper: Omnidisksweeper,
@@ -1870,6 +1872,7 @@ export const SOFTWARE_NAME_TO_ICON_MAP = {
   santa: Santa,
   "sbarex qlmarkdown": Qlmarkdown,
   "sc menu": ScMenu,
+  scaleft: ScaleFt,
   scratch: Scratch,
   "screen studio": ScreenStudio,
   screenflick: Screenflick,