Kill --name from llama stack build

[ashwinb]

What does this PR do?

Simplifies llama stack build. We don't need --name and can just rely on --template as the name. When doing build from the wizard we explicitly ask for a name.

Feature/Issue validation/testing/test plan

Test with conda

Ran llama stack build tgi followed by llama stack configure tgi followed by llama stack run tgi --port 5003.

Post that ran llama stack build tgi --image-type docker which started the docker build process.

Making sure it is gone from documentation:

$ rg -- --name
distributions/meta-reference-gpu/README.md
42:docker run --network host --name mypostgres -it -p 5432:5432 -e POSTGRES_PASSWORD=mysecretpassword -e POSTGRES_USER=postgres -e POSTGRES_DB=postgres pgvector/pgvector:pg16
73:docker run -it --network host --name chromadb -p 6000:6000 -v ./chroma_vdb:/chroma/chroma -e IS_PERSISTENT=TRUE chromadb/chroma:latest

llama_stack/distribution/common.sh
13:  conda env remove --name $envname -y

distributions/ollama/README.md
62:docker run -d -v ollama:/root/.ollama -p 11434:11434 --name ollama ollama/ollama

llama_stack/providers/impls/meta_reference/inference/quantization/scripts/build_conda.sh
25:    yes | conda remove --name $ENV_NAME --all

Before submitting

• Did you make sure to update the documentation with your changes?

[yanxi0830]

❤️