Introduce ps-stacks prescription for ps-cv-pytorch (#17213)

* Introduce ps-stacks prescriptions

Signed-off-by: Francesco Murdaca <fmurdaca@redhat.com>

* Update prescription to just show justification

Signed-off-by: Francesco Murdaca <fmurdaca@redhat.com>

* Add manifest change

Signed-off-by: Francesco Murdaca <fmurdaca@redhat.com>

* Use boot not wrap unit

Signed-off-by: Francesco Murdaca <fmurdaca@redhat.com>

prescriptions/_predictable_stacks/ps_cv_torch.yaml

@@ -0,0 +1,19 @@
+units:
+  boots:
+  - name: ThothPSCVTorchBaseImageBoot
+    type: boot
+    should_include:
+      adviser_pipeline: true
+      runtime_environments:
+        base_images: [null]  # Only if no base image is used.
+    match:
+    - package_name: opencv-python
+    - package_name: torch
+    run:
+      log:
+        type: INFO
+        message: Found predictive stack image that can be used with these dependencies
+      stack_info:
+      - type: INFO
+        message: Consider using predictive stack for computer vision with Pytorch
+        link: https://quay.io/repository/thoth-station/ps-cv-pytorch