crypto: add guards and adjust tests for BoringSSL #5768

Job	Run time
Build slim tarball	1m 48s
aarch64-darwin: with shared libraries	22m 44s
x86_64-linux: with shared libraries	22m 54s
x86_64-darwin: with shared libraries	35m 37s
aarch64-linux: with shared libraries	19m 27s
	1h 42m 30s

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