Add fuzzer for MAC address parser #294

Job	Run time
test-cross (aarch64-unknown-linux-gnu)	1m 7s
test-matrix (ubuntu-22.04, stable)	17s
test-cross (aarch64-unknown-linux-musl)	1m 7s
test-matrix (ubuntu-22.04, beta)	15s
test-cross (armv7-unknown-linux-musleabi)	51s
test-matrix (ubuntu-22.04, nightly)	15s
test-cross (x86_64-unknown-linux-musl)	55s
test-matrix (ubuntu-22.04, 1.84.0)	17s
test-matrix (ubuntu-24.04, stable)	12s
test-matrix (ubuntu-24.04, beta)	16s
test-matrix (ubuntu-24.04, nightly)	16s
test-matrix (ubuntu-24.04, 1.84.0)	15s
test-matrix (macos-14, stable)	46s
test-matrix (macos-14, beta)	1m 33s
test-matrix (macos-14, nightly)	1m 8s
test-matrix (macos-14, 1.84.0)	48s
test-matrix (macos-15, stable)	1s
test-matrix (macos-15, beta)	1s
test-matrix (macos-15, nightly)	1s
test-matrix (macos-15, 1.84.0)	15s
	10m 36s

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