Address review comments

Refactor wheel processing, simplify deploy/* checks, drop unused cases, and sort inserts/packages for consistent output

Author: kavi2du

src/briefcase/platforms/web/static.py

@@ -160,7 +160,7 @@ def _write_inserts(self, app: AppConfig, filename: Path, inserts: dict):
             return
 
         # Each insert slot may have multiple package contributions
-        for insert, packages in inserts.items():
+        for insert, packages in sorted(inserts.items()):
             html_banner = (
                 "<!--------------------------------------------------\n"
                 " * {package}\n"
@@ -515,7 +515,7 @@ def build_app(self, app: AppConfig, **kwargs):
                 )
 
             # Write inserts per target
-            for target, target_inserts in inserts.items():
+            for target, target_inserts in sorted(inserts.items()):
                 self._write_inserts(app, Path(target), target_inserts)
 
         return {}