Add a local-vllm template

This is just like `local` using `meta-reference` for everything except
it uses `vllm` for inference.

Docker works, but So far, `conda` is a bit easier to use with the vllm
provider. The default container base image does not include all the
necessary libraries for all vllm features. More cuda dependencies are
necessary.

I started changing this base image used in this template, but it also
required changes to the Dockerfile, so it was getting too involved to
include in the first PR.

Signed-off-by: Russell Bryant <rbryant@redhat.com>

llama_stack/distribution/templates/local-vllm-build.yaml

@@ -0,0 +1,10 @@
+name: local-vllm
+distribution_spec:
+  description: Like local, but use vLLM for running LLM inference
+  providers:
+    inference: vllm
+    memory: meta-reference
+    safety: meta-reference
+    agents: meta-reference
+    telemetry: meta-reference
+image_type: conda