Use `tox-uv-bare` instead of `tox-uv`

[coretl]

As we already have uv in the environment

[coretl]

Switching this over in ophyd-async gives the following:

tests: FAIL ✖ in 0.02 seconds
tests: commands[0]> pytest --cov=ophyd_async --cov-report term --cov-report xml:cov.xml
tests: failed with pytest is not allowed, use allowlist_externals to allow it
pre-commit: FAIL ✖ in 0.03 seconds
pre-commit: commands[0]> pre-commit run --all-files --show-diff-on-failure
pre-commit: failed with pre-commit is not allowed, use allowlist_externals to allow it
docs: FAIL ✖ in 0.03 seconds
docs: commands[0]> sphinx-build --fresh-env --show-traceback --fail-on-warning --keep-going docs build/html
docs: failed with sphinx-build is not allowed, use allowlist_externals to allow it
type-checking: commands[0]> pyright src --pythonpath /cache/venv-for/dls/science/users/tmc43/repos/ophyd-async/bin/python
type-checking: failed with pyright is not allowed, use allowlist_externals to allow it
  pre-commit: FAIL code 1 (0.03 seconds)
  type-checking: FAIL code 1 (0.03 seconds)
  tests: FAIL code 1 (0.02 seconds)
  docs: FAIL code 1 (0.03 seconds)
  evaluation failed :( (0.09 seconds)

Need to add to allowlist_externals to make this work:

[tool.tox.env_run_base]
# Allow binaries from the base env to be run
allowlist_externals = [
    "pytest",
    "pre-commit",
    "sphinx-build",
    "sphinx-autobuild",
    "pyright",  # or mypy
]