[chore] Bring a few attributes that were removed back (as deprecated)

model/registry/deprecated/container.yaml

@@ -0,0 +1,10 @@
+groups:
+  - id: deprecated.container.attributes
+    type: attribute_group
+    brief: "Describes deprecated container attributes."
+    attributes:
+      - id: container.labels
+        type: template[string]
+        examples: [ 'container.label.app=nginx' ]
+        brief: "Deprecated, use `container.label` instead."
+        deprecated: "Replaced by `container.label`."

model/registry/deprecated/k8s.yaml

@@ -0,0 +1,10 @@
+groups:
+  - id: deprecated.k8s.attributes
+    type: attribute_group
+    brief: "Describes deprecated k8s attributes."
+    attributes:
+      - id: k8s.pod.labels
+        type: template[string]
+        examples: ['k8s.pod.label.app=my-app']
+        brief: "Deprecated, use `k8s.pod.label` instead."
+        deprecated: "Replaced by `k8s.pod.label`."

model/registry/deprecated/system.yaml

@@ -0,0 +1,20 @@
+groups:
+  - id: attributes.system.deprecated
+    type: attribute_group
+    brief: "Deprecated system attributes."
+    attributes:
+      - id: system.processes.status
+        type:
+          allow_custom_values: true
+          members:
+            - id: running
+              value: 'running'
+            - id: sleeping
+              value: 'sleeping'
+            - id: stopped
+              value: 'stopped'
+            - id: defunct
+              value: 'defunct'
+        brief: "Deprecated, use `system.process.status` instead."
+        deprecated: "Replaced by `system.process.status`."
+        examples: ["running"]