ci: Use reusable workflows for fmt and security_audit & fix CI failure #648

Job	Run time
clippy	14s
msrv (ubuntu-latest, 1.63)	47s
test (ubuntu-latest, nightly)	29s
msrv (windows-latest, 1.63)	1m 8s
test-android (nightly, aarch64-linux-android)	1m 49s
test (ubuntu-latest, beta)	28s
test (ubuntu-latest, stable)	31s
test (windows-latest, nightly)	47s
test (windows-latest, beta)	44s
test (windows-latest, stable)	1m 12s
test (macos-latest, nightly)	27s
test (macos-latest, beta)	25s
test (macos-latest, stable)	17s
fmt / fmt	13s
security_audit / security_audit	2m 47s
	12m 18s

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