Add --uv-with constraint support for uvx:// builds; unskip arxiv e2e - #6111

Add --uv-with constraint support for uvx:// builds; unskip arxiv e2e#6111

ChrisJBurns merged 2 commits into

mainstacklok/toolhive:mainfrom

uvx-build-constraintsstacklok/toolhive:uvx-build-constraintsCopy head branch name to clipboard