chore: moving the storePath to it's own variable as source-ref and fixing templates to use cookiecutter vars

plugins/scaffolder-backend/sample-templates/docs-template/{{cookiecutter.component_id}}/catalog-info.yaml

@@ -3,8 +3,8 @@ kind: Component
 metadata:
   name: {{cookiecutter.component_id | jsonify}}
   description: {{cookiecutter.description | jsonify}}
-  annotations:
-    github.com/project-slug: {{cookiecutter.storePath | jsonify}}
+    github.com/project-slug: {{cookiecutter.destination.git.owner + "/" + cookiecutter.destination.git.name}}
+    backstage.io/source-ref: {{cookiecutter.storePath | jsonify}}
     backstage.io/techdocs-ref: url:{{cookiecutter.storePath}}
 spec:
   type: documentation

plugins/scaffolder-backend/sample-templates/react-ssr-template/{{cookiecutter.component_id}}/catalog-info.yaml

@@ -4,7 +4,8 @@ metadata:
   name: {{cookiecutter.component_id | jsonify}}
   description: {{cookiecutter.description | jsonify}}
   annotations:
-    github.com/project-slug: {{cookiecutter.storePath | jsonify}}
+    github.com/project-slug: {{cookiecutter.destination.git.owner + "/" + cookiecutter.destination.git.name}}
+    backstage.io/source-url: {{cookiecutter.storePath | jsonify}}
     backstage.io/techdocs-ref: url:{{cookiecutter.storePath}}
 spec:
   type: website

plugins/scaffolder-backend/sample-templates/springboot-grpc-template/{{cookiecutter.component_id}}/catalog-info.yaml

@@ -4,7 +4,8 @@ metadata:
   name: {{cookiecutter.component_id | jsonify}}
   description: {{cookiecutter.description | jsonify}}
   annotations:
-    github.com/project-slug: {{cookiecutter.storePath | jsonify}}
+    github.com/project-slug: {{cookiecutter.destination.git.owner + "/" + cookiecutter.destination.git.name}}
+    backstage.io/source-url: {{cookiecutter.storePath | jsonify}}
     backstage.io/techdocs-ref: url:{{cookiecutter.storePath}}
 spec:
   type: service