signing: change default gpg program, add --keyid-format option accordingly #9347

Job	Run time
Check protos	1m 8s
cargo-deny (advisories)	26s
Clippy check	3m 21s
build (ubuntu-latest)	3m 3s
cargo-deny (bans licenses sources)	22s
build (macos-14)	2m 43s
Check that MkDocs can build the docs	29s
build (windows-latest)	7m 54s
Check that MkDocs can build the docs with Poetry 1.3.2	36s
Check formatting	17s
build (ubuntu-latest, --all-features)	4m 1s
	24m 20s

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