cli/tests: move a lot of the cli tests to gitoxide #5575 #14

Job	Run time
nix flake (ubuntu-24.04)	6m 58s
check (clippy)	2m 48s
check (cargo-deny, advisories)	31s
nix flake (ubuntu-24.04-arm)	5m 9s
check (cargo-deny, bans)	23s
nix flake (macos-14)	8m 14s
check (codespell)	10s
check (cargo-deny, licenses)	23s
check (cargo-deny, sources)	22s
check (doctests)	2m 43s
check (mkdocs)	11s
check (latest mkdocs, optional)	14s
check (protos)	34s
check (rustfmt)	16s
build (no git)	1m 16s
test (linux-x86_64-gnu)	7m 12s
test (linux-aarch64-gnu)	5m 13s
test (macos-x86_64)	15m 3s
test (macos-aarch64)	4m 21s
test (windows-x86_64)	13m 1s
	1h 15m 2s

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