fix(templates): pin intel-dlstreamer to 2025.2.0

The latest intel-dlstreamer (2026.0.0) in the DLS APT repo depends on
libopenvino-2026.0.0 and openvino-2026.0.0, but the openvino/2026
repository has not been published yet. The openvino/2025 repo only
contains packages up to version 2025.4.1.

Pin intel-dlstreamer to 2025.2.0 (the latest version compatible with
the openvino/2025 repo) in all affected deb-based templates using the
underscore syntax (intel-dlstreamer_2025.2.0), which CleanDebName
converts to apt's = version pinning format.

Affected templates:
- ubuntu24-x86_64-dlstreamer.yml
- elxr12-x86_64-dlstreamer.yml
- ubuntu24-x86_64-minimal-ptl-dls.yml

Author: arodage

image-templates/elxr12-x86_64-dlstreamer.yml

@@ -96,7 +96,7 @@ systemConfig:
     enabled: false # default is true, overridden to false here
 
   packages:
-    - intel-dlstreamer
+    - intel-dlstreamer_2025.2.0
     - firmware-linux
 
   kernel:

image-templates/ubuntu24-x86_64-dlstreamer.yml

@@ -94,7 +94,7 @@ systemConfig:
     - openssh-server
     - systemd-resolved
     - systemd-timesyncd
-    - intel-dlstreamer
+    - intel-dlstreamer_2025.2.0
     - linux-firmware
 
   kernel:

image-templates/ubuntu24-x86_64-minimal-ptl-dls.yml

@@ -372,7 +372,7 @@ systemConfig:
     #dls based pkg
     - docker.io
     - docker-compose-plugin
-    - intel-dlstreamer
+    - intel-dlstreamer_2025.2.0
 
   additionalFiles:
     - local: ../additionalfiles/ptl/01-network-manager-all.yaml