lib: define `kEnumerableProperty` atomically #7376

Job	Run time
Build slim tarball	1m 23s
x86_64-linux: with shared libraries	28m 12s
x86_64-darwin: with shared libraries	51m 0s
aarch64-linux: Cache V8 build	26s
aarch64-darwin: with shared libraries	24m 15s
aarch64-linux: with shared openssl-3.6.2	26m 50s
aarch64-linux: with shared openssl-3.5.6	26m 38s
aarch64-linux: with shared boringssl-0.20260508.0	25m 47s
aarch64-linux: with shared openssl-4.0.0	25m 0s
aarch64-linux: with shared openssl-1.1.1w	26m 22s
aarch64-linux: with shared openssl-3.0.20	27m 14s
	4h 23m 7s

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