feat: add support for owner (#556)

A follow up pr to adding `owner` to `py_image_layer`. This will allow an
us to pass `group` to the image layer for that group ownership
attribution

#545

---

### Changes are visible to end-users: yes

<!-- If no, please delete this section. -->

- Searched for relevant documentation and updated as needed: no
- Breaking change (forces users to change their own code or config): no
- Suggested release notes appear below: no

### Test plan

- Covered by existing test cases

Author: ajrpeggio

MODULE.bazel

@@ -12,7 +12,7 @@ module(
 # py_image_layer requires 2.x for the `tar` rule.
 # py_image_layer needs compute_unused_inputs attribute
 # py_image_layer needs repo_mapping fix.
-bazel_dep(name = "aspect_bazel_lib", version = "2.10.0")
+bazel_dep(name = "aspect_bazel_lib", version = "2.16.0")
 bazel_dep(name = "bazel_skylib", version = "1.4.2")
 bazel_dep(name = "rules_python", version = "0.29.0")
 bazel_dep(name = "platforms", version = "0.0.7")

docs/py_image_layer.md

@@ -100,6 +100,7 @@ def py_image_layer(
         compute_unused_inputs = 1,
         platform = None,
         owner = None,
+        group = None,
         **kwargs):
     """Produce a separate tar output for each layer of a python app
 
@@ -130,6 +131,7 @@ def py_image_layer(
         compute_unused_inputs: Whether to compute unused inputs. Default is 1. See: https://github.com/bazel-contrib/bazel-lib/blob/main/docs/tar.md#tar_rule-compute_unused_inputs
         platform: The platform to use for the transition. Default is None. See: https://github.com/bazel-contrib/bazel-lib/blob/main/docs/transitions.md#platform_transition_binary-target_platform
         owner: An owner uid for the uncompressed files. See mtree_mutate: https://github.com/bazel-contrib/bazel-lib/blob/main/docs/tar.md#mutating-the-tar-contents
+        group: A group uid for the uncompressed files. See mtree_mutate: https://github.com/bazel-contrib/bazel-lib/blob/main/docs/tar.md#mutating-the-tar-contents
         tar_args: Additional arguments to pass to the tar rule. Default is `[]`. See: https://github.com/bazel-contrib/bazel-lib/blob/main/docs/tar.md#tar_rule-args
         **kwargs: attribute that apply to all targets expanded by the macro
 
@@ -152,6 +154,7 @@ def py_image_layer(
             name = manifest_name,
             mtree = name + ".manifest.preprocessed",
             owner = owner,
+            group = group,
         )
     else:
         mtree_spec(