chore: remove distributions dir (#1809)

# What does this PR do?

Followup on https://github.com/meta-llama/llama-stack/pull/1801. Move
the deps files to llama_stack/templates.

Signed-off-by: Sébastien Han <seb@redhat.com>

MANIFEST.in

@@ -1,5 +1,5 @@
 include pyproject.toml
-include distributions/dependencies.json
+include llama_stack/templates/dependencies.json
 include llama_stack/models/llama/llama3/tokenizer.model
 include llama_stack/distribution/*.sh
 include llama_stack/cli/scripts/*.sh

scripts/distro_codegen.py

@@ -117,7 +117,7 @@ def generate_dependencies_file(change_tracker: ChangedPathTracker):
         if name:
             distribution_deps[name] = deps
 
-    deps_file = REPO_ROOT / "distributions" / "dependencies.json"
+    deps_file = REPO_ROOT / "llama_stack" / "templates" / "dependencies.json"
     change_tracker.add_paths(deps_file)
     with open(deps_file, "w") as f:
         f.write(json.dumps(distribution_deps, indent=2) + "\n")