Add venv-uv label for venvs created with `uv` #1133

Job	Run time
Builds (ubuntu-latest, x86_64-unknown-linux-musl, yes)	2m 2s
Builds (windows-latest, x86_64-pc-windows-msvc)	3m 54s
Builds (macos-latest, x86_64-apple-darwin, yes)	2m 36s
Tests in Containers (ci-jupyter-container, ubuntu-latest, mcr.microsoft.com/devcontainers/univers...	4m 7s
Tests (ubuntu-latest, x86_64-unknown-linux-musl, yes)	8m 17s
Tests (windows-latest, x86_64-pc-windows-msvc, yes)	7m 45s
Builds (windows-latest, aarch64-pc-windows-msvc)	3m 40s
Builds (macos-14, aarch64-apple-darwin, yes)	2m 1s
Tests (macos-latest, x86_64-apple-darwin, yes)	12m 32s
Tests (macos-14, aarch64-apple-darwin, yes)	11m 16s
Env Tests (ci-poetry-custom, ubuntu-latest, x86_64-unknown-linux-musl)	2m 37s
Tests in Containers (ci-homebrew-container, ubuntu-latest, homebrew/brew, x86_64-unknown-linux-musl)	3m 33s
Env Tests (ci-poetry-project, ubuntu-latest, x86_64-unknown-linux-musl)	2m 22s
Env Tests (ci-poetry-global, ubuntu-latest, x86_64-unknown-linux-musl)	2m 41s
Env Tests (ci-poetry-custom, windows-latest, x86_64-pc-windows-msvc)	5m 2s
Env Tests (ci-poetry-global, windows-latest, x86_64-pc-windows-msvc)	4m 57s
Env Tests (ci-poetry-project, windows-latest, x86_64-pc-windows-msvc)	4m 36s
	1h 23m 58s

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