Add venv-uv label for venvs created with `uv` #1134

Job	Run time
Env Tests (ci-poetry-global, windows-latest, x86_64-pc-windows-msvc)	5m 13s
Tests in Containers (ci-homebrew-container, ubuntu-latest, homebrew/brew, x86_64-unknown-linux-musl)	3m 40s
Env Tests (ci-poetry-global, ubuntu-latest, x86_64-unknown-linux-musl)	2m 40s
Tests in Containers (ci-jupyter-container, ubuntu-latest, mcr.microsoft.com/devcontainers/univers...	4m 8s
Env Tests (ci-poetry-custom, ubuntu-latest, x86_64-unknown-linux-musl)	2m 26s
Env Tests (ci-poetry-project, ubuntu-latest, x86_64-unknown-linux-musl)	2m 27s
Env Tests (ci-poetry-project, windows-latest, x86_64-pc-windows-msvc)	4m 26s
Builds (ubuntu-latest, x86_64-unknown-linux-musl, yes)	1m 50s
Builds (macos-14, aarch64-apple-darwin, yes)	2m 15s
Builds (windows-latest, x86_64-pc-windows-msvc)	4m 6s
Tests (ubuntu-latest, x86_64-unknown-linux-musl, yes)	8m 44s
Builds (windows-latest, aarch64-pc-windows-msvc)	3m 52s
Builds (macos-latest, x86_64-apple-darwin, yes)	2m 2s
Tests (macos-latest, x86_64-apple-darwin, yes)	10m 42s
Tests (windows-latest, x86_64-pc-windows-msvc, yes)	6m 30s
Tests (macos-14, aarch64-apple-darwin, yes)	10m 20s
Env Tests (ci-poetry-custom, windows-latest, x86_64-pc-windows-msvc)	5m 20s
	1h 20m 41s

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