src: decouple KeyObject and CryptoKey and move CryptoKey to src #6187

Job	Run time
Build slim tarball	1m 21s
collect-openssl-versions	8s
aarch64-linux: Cache V8 build	32s
x86_64-darwin: with shared libraries	48m 53s
aarch64-darwin: with shared libraries	25m 32s
x86_64-linux: with shared libraries	28m 48s
aarch64-linux: with shared openssl_3_5 (3.5.5)	24m 12s
aarch64-linux: with shared openssl_1_1 (1.1.1w)	23m 56s
aarch64-linux: with shared openssl_3_6 (3.6.1)	24m 26s
aarch64-linux: with shared openssl_3 (3.0.19)	25m 41s
aarch64-linux: with shared openssl_4_0 (4.0.0)	23m 18s
	3h 46m 47s

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