ffi: validate 'void' as parameter type in getFunction and getFunctions #7165

Job	Run time
Build slim tarball	1m 20s
aarch64-linux: Cache V8 build	24s
x86_64-linux: with shared libraries	29m 29s
aarch64-darwin: with shared libraries	27m 37s
x86_64-darwin: with shared libraries	44m 17s
aarch64-linux: with shared openssl-4.0.0	24m 7s
aarch64-linux: with shared openssl-3.0.19	26m 31s
aarch64-linux: with shared openssl-1.1.1w	25m 41s
aarch64-linux: with shared openssl-3.5.5	26m 1s
aarch64-linux: with shared boringssl-0.20260413.0	26m 6s
aarch64-linux: with shared openssl-3.6.1	26m 16s
	4h 17m 49s

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