crypto: deduplicate X509 subject matching logic #7606

Job	Run time
Build slim tarball	1m 11s
aarch64-linux: Cache V8 build	26s
aarch64-darwin: with shared libraries	27m 43s
x86_64-linux: with shared libraries	24m 26s
x86_64-darwin: with shared libraries	38m 17s
aarch64-linux: with shared openssl-4.0.0	23m 42s
aarch64-linux: with shared openssl-3.5.6	24m 7s
aarch64-linux: with shared openssl-3.6.2	23m 58s
aarch64-linux: with shared openssl-1.1.1w	23m 36s
aarch64-linux: with shared boringssl-0.20260508.0	23m 59s
aarch64-linux: with shared openssl-3.0.20	24m 20s
	3h 55m 45s

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