fix: venv: support `tags` attribute

Currently

```starlark
create_venv(
name = "create_venv",
requirements_in = "//:pyproject.toml",
requirements_txt = "//:requirements_lock.txt"
tags = ["manual"]
)
```

Fails with

```sh
Error: create_venv() got unexpected keyword argument: tags
```

Start at the create_venv entry point and inspect how its arguments are accepted. Use the example with pyproject.toml, requirements_lock.txt, and tags=["manual"] as the reproduction; done means the call no longer raises an unexpected keyword argument error and the tag is accepted.

Written by the indexing model from the issue text.