crypto: harden WebCrypto against prototype pollution #7120

Job	Run time
Build slim tarball	1m 16s
aarch64-linux: Cache V8 build	23s
x86_64-darwin: with shared libraries	38m 52s
x86_64-linux: with shared libraries	29m 22s
aarch64-darwin: with shared libraries	24m 49s
aarch64-linux: with shared openssl-1.1.1w	25m 17s
aarch64-linux: with shared openssl-3.5.5	24m 22s
aarch64-linux: with shared openssl-3.0.19	24m 49s
aarch64-linux: with shared openssl-4.0.0	25m 7s
aarch64-linux: with shared openssl-3.6.1	24m 39s
aarch64-linux: with shared boringssl-0.20260413.0	24m 20s
	4h 3m 16s

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