cli: git push: allow signing commits on push #17967

Job	Run time
Check protos	35s
build (ubuntu-24.04)	5m 26s
Build without Git support	1m 10s
cargo-deny (advisories)	24s
build (macos-13)	8m 2s
Run doctests	2m 28s
cargo-deny (bans licenses sources)	24s
build (macos-14)	4m 34s
Clippy check	2m 39s
build (windows-latest)	11m 6s
Check that MkDocs can build the docs with latest Python and uv	12s
build (ubuntu-24.04, --all-features)	6m 22s
Check that MkDocs can build the docs	10s
Check formatting	19s
	43m 51s

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