Add util to update issuer flags for SAC testing (#1320) #4179

Job	Run time
semver-checks	2m 36s
cargo-deny (advisories)	41s
build-fuzz	2m 22s
check-git-rev-deps	12s
cargo-deny (bans licenses sources)	39s
build-and-test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	2m 36s
docs	2m 36s
fmt	8s
build-and-test (msrv, ubuntu-latest, aarch64-unknown-linux-gnu, true)	2m 34s
build-and-test (msrv, windows-latest, x86_64-pc-windows-msvc)	2m 28s
build-and-test (latest, ubuntu-latest, x86_64-unknown-linux-gnu)	2m 33s
readme	2m 21s
build-and-test (latest, ubuntu-latest, aarch64-unknown-linux-gnu, true)	2m 35s
build-and-test (latest, windows-latest, x86_64-pc-windows-msvc)	2m 28s
publish-dry-run (ubuntu-latest, wasm32-unknown-unknown) / publish-dry-run / publish-dry-run	2m 34s
publish-dry-run (ubuntu-latest, x86_64-unknown-linux-gnu, --feature-powerset --exclude-features d... / publish-dry-run / publish-dry-run	2m 35s
complete	4s
	32m 2s

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