Add uv ecosystem to dependabot and drop weekly lockfile workflow #2819

Job	Run time
checks / readme-snippets	14s
checks / pre-commit	38s
checks / test (3.11, locked, windows-latest)	1m 27s
checks / test (3.11, lowest-direct, windows-latest)	1m 35s
checks / test (3.13, locked, windows-latest)	1m 33s
checks / test (3.11, lowest-direct, ubuntu-latest)	59s
checks / test (3.10, locked, windows-latest)	1m 32s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 6s
checks / test (3.11, locked, ubuntu-latest)	56s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 4s
checks / test (3.14, lowest-direct, ubuntu-latest)	58s
checks / test (3.13, lowest-direct, windows-latest)	2m 16s
checks / test (3.14, lowest-direct, windows-latest)	1m 30s
checks / test (3.10, locked, ubuntu-latest)	1m 3s
checks / test (3.12, locked, ubuntu-latest)	1m 2s
checks / test (3.10, lowest-direct, windows-latest)	1m 47s
checks / test (3.12, locked, windows-latest)	2m 8s
checks / test (3.10, lowest-direct, ubuntu-latest)	58s
checks / test (3.14, locked, ubuntu-latest)	1m 55s
checks / test (3.14, locked, windows-latest)	2m 13s
checks / test (3.13, locked, ubuntu-latest)	58s
checks / test (3.12, lowest-direct, windows-latest)	1m 36s
all-green	5s
	29m 33s

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