fix: remove leftover post_training and toolgroups CLI commands (#333)

## Summary
- Remove `post_training` CLI module which references removed
`post_training` API types (`AlgorithmConfig`, `TrainingConfig`) and
`client.post_training` resource
- Remove `toolgroups` CLI module which references removed
`toolgroup_register_params` type and `client.toolgroups` resource
- These broken imports caused the entire CLI (`llama-stack-client`) to
crash on any invocation

## Test plan
- [x] Verified `llama-stack-client --help` runs successfully after the
fix
- [x] Verified all remaining CLI submodule imports succeed

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Charlie Doern <cdoern@redhat.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: 3 people

src/llama_stack_client/lib/cli/llama_stack_client.py

@@ -20,11 +20,9 @@
 from .inference import inference
 from .inspect import inspect
 from .models import models
-from .post_training import post_training
 from .providers import providers
 from .scoring_functions import scoring_functions
 from .shields import shields
-from .toolgroups import toolgroups
 from .vector_stores import vector_stores
 
 
@@ -90,9 +88,7 @@ def llama_stack_client(ctx, endpoint: str, api_key: str, config: str | None):
 llama_stack_client.add_command(scoring_functions, "scoring_functions")
 llama_stack_client.add_command(eval, "eval")
 llama_stack_client.add_command(inference, "inference")
-llama_stack_client.add_command(post_training, "post_training")
 llama_stack_client.add_command(inspect, "inspect")
-llama_stack_client.add_command(toolgroups, "toolgroups")
 
 
 def main():