Support upload Templates where the format is compressed

### The required feature described as a wish

As a User/Admin/Operator I would like to upload a compressed template from local

Currently Cloudstack supports the registration of template whose format is also compressed

resolute-server-cloudimg-amd64.img
resolute-server-cloudimg-amd64.qcow2
resolute-server-cloudimg-amd64.qcow2.bz2
resolute-server-cloudimg-amd64.xz

When a admin user tries to upload a template from local whose format is .qcow2.bz2 it fails

resolute-server-cloudimg-amd64.qcow2.bz2
resolute-server-cloudimg-amd64.tar.gz
resolute-server-cloudimg-amd64-root.tar.xz

Error is thrown

```
2026-05-18 07:35:41,469 ERROR [c.c.s.I.UploadStatusCheck] (Upload-Monitor-1:[ctx-abbe0176]) (logid:f692675e) Template Template {"format":"QCOW2","id":214,"name":"testcom","uniqueName":"214-2-f74f8eac-5a21-3a6e-aaf1-9c68a5e976da","uuid":"5c9ff495-1f54-47d7-a8ef-c74c751c0ab8"} failed to upload. Error details: File type mismatch between uploaded file and selected format. Selected file format: QCOW2. Received: bzip2 compressed data, block size = 900k"

```

Commencez par le chemin de téléversement local des modèles et l’erreur UploadStatusCheck signalée, puis suivez l’endroit où le type du fichier téléversé est comparé au format QCOW2 sélectionné. Le travail est terminé lorsque les téléversements locaux des formats compressés listés, notamment .qcow2.bz2, .tar.gz et .root.tar.xz, n’échouent plus en raison d’une incompatibilité de type de fichier.

Rédigé par le modèle d'indexation à partir du texte de l'issue.