test: Use newer example Snap as NPM fixture (#3570)

Use a newer example Snap as the test fixture for unpacking tarballs.
This lets us remove the unmaintained `template-snap` which didn't even
have a valid manifest.

Author: FrederikBolding

packages/snaps-controllers/package.json

@@ -112,7 +112,6 @@
     "@lavamoat/allow-scripts": "^3.3.4",
     "@metamask/auto-changelog": "^5.0.2",
     "@metamask/browser-passworder": "^6.0.0",
-    "@metamask/template-snap": "^0.7.0",
     "@noble/hashes": "^1.7.1",
     "@swc/core": "1.11.31",
     "@swc/jest": "^0.2.38",