feat: consolidate most distros into "starter" (#2516)

# What does this PR do?

* Removes a bunch of distros
* Removed distros were added into the "starter" distribution
* Doc for "starter" has been added
* Partially reverts https://github.com/meta-llama/llama-stack/pull/2482
  since inference providers are disabled by default and can be turned on
  manually via env variable.
* Disables safety in starter distro

Closes: https://github.com/meta-llama/llama-stack/issues/2502.

~Needs: https://github.com/meta-llama/llama-stack/pull/2482 for Ollama
to work properly in the CI.~

TODO:

- [ ] We can only update `install.sh` when we get a new release.
- [x] Update providers documentation
- [ ] Update notebooks to reference starter instead of ollama

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

llama_stack/templates/dell/dell.py

@@ -1,142 +0,0 @@
-# Copyright (c) Meta Platforms, Inc. and affiliates.
-# All rights reserved.
-#
-# This source code is licensed under the terms described in the LICENSE file in
-# the root directory of this source tree.
-
-from llama_stack.apis.models import ModelType
-from llama_stack.distribution.datatypes import (
-    ModelInput,
-    Provider,
-    ShieldInput,
-    ToolGroupInput,
-)
-from llama_stack.providers.inline.inference.sentence_transformers import (
-    SentenceTransformersInferenceConfig,
-)
-from llama_stack.templates.template import DistributionTemplate, RunConfigSettings
-
-
-def get_distribution_template() -> DistributionTemplate:
-    providers = {
-        "inference": ["remote::tgi", "inline::sentence-transformers"],
-        "vector_io": ["inline::faiss", "remote::chromadb", "remote::pgvector"],
-        "safety": ["inline::llama-guard"],
-        "agents": ["inline::meta-reference"],
-        "telemetry": ["inline::meta-reference"],
-        "eval": ["inline::meta-reference"],
-        "datasetio": ["remote::huggingface", "inline::localfs"],
-        "scoring": ["inline::basic", "inline::llm-as-judge", "inline::braintrust"],
-        "tool_runtime": [
-            "remote::brave-search",
-            "remote::tavily-search",
-            "inline::rag-runtime",
-        ],
-    }
-    name = "dell"
-    inference_provider = Provider(
-        provider_id="tgi0",
-        provider_type="remote::tgi",
-        config={
-            "url": "${env.DEH_URL}",
-        },
-    )
-    safety_inference_provider = Provider(
-        provider_id="tgi1",
-        provider_type="remote::tgi",
-        config={
-            "url": "${env.DEH_SAFETY_URL}",
-        },
-    )
-    embedding_provider = Provider(
-        provider_id="sentence-transformers",
-        provider_type="inline::sentence-transformers",
-        config=SentenceTransformersInferenceConfig.sample_run_config(),
-    )
-    chromadb_provider = Provider(
-        provider_id="chromadb",
-        provider_type="remote::chromadb",
-        config={
-            "url": "${env.CHROMA_URL}",
-        },
-    )
-
-    inference_model = ModelInput(
-        model_id="${env.INFERENCE_MODEL}",
-        provider_id="tgi0",
-    )
-    safety_model = ModelInput(
-        model_id="${env.SAFETY_MODEL}",
-        provider_id="tgi1",
-    )
-    embedding_model = ModelInput(
-        model_id="all-MiniLM-L6-v2",
-        provider_id="sentence-transformers",
-        model_type=ModelType.embedding,
-        metadata={
-            "embedding_dimension": 384,
-        },
-    )
-    default_tool_groups = [
-        ToolGroupInput(
-            toolgroup_id="builtin::websearch",
-            provider_id="brave-search",
-        ),
-        ToolGroupInput(
-            toolgroup_id="builtin::rag",
-            provider_id="rag-runtime",
-        ),
-    ]
-
-    return DistributionTemplate(
-        name=name,
-        distro_type="self_hosted",
-        description="Dell's distribution of Llama Stack. TGI inference via Dell's custom container",
-        container_image=None,
-        providers=providers,
-        run_configs={
-            "run.yaml": RunConfigSettings(
-                provider_overrides={
-                    "inference": [inference_provider, embedding_provider],
-                    "vector_io": [chromadb_provider],
-                },
-                default_models=[inference_model, embedding_model],
-                default_tool_groups=default_tool_groups,
-            ),
-            "run-with-safety.yaml": RunConfigSettings(
-                provider_overrides={
-                    "inference": [
-                        inference_provider,
-                        safety_inference_provider,
-                        embedding_provider,
-                    ],
-                    "vector_io": [chromadb_provider],
-                },
-                default_models=[inference_model, safety_model, embedding_model],
-                default_shields=[ShieldInput(shield_id="${env.SAFETY_MODEL}")],
-                default_tool_groups=default_tool_groups,
-            ),
-        },
-        run_config_env_vars={
-            "DEH_URL": (
-                "http://0.0.0.0:8181",
-                "URL for the Dell inference server",
-            ),
-            "DEH_SAFETY_URL": (
-                "http://0.0.0.0:8282",
-                "URL for the Dell safety inference server",
-            ),
-            "CHROMA_URL": (
-                "http://localhost:6601",
-                "URL for the Chroma server",
-            ),
-            "INFERENCE_MODEL": (
-                "meta-llama/Llama-3.2-3B-Instruct",
-                "Inference model loaded into the TGI server",
-            ),
-            "SAFETY_MODEL": (
-                "meta-llama/Llama-Guard-3-1B",
-                "Name of the safety (Llama-Guard) model to use",
-            ),
-        },
-    )