fs: fix enumerability of `Date` properties on `Stats` objects #6834

Job	Run time
Build slim tarball	1m 30s
aarch64-linux: Cache V8 build	20s
x86_64-darwin: with shared libraries	42m 50s
x86_64-linux: with shared libraries	28m 21s
aarch64-darwin: with shared libraries	27m 51s
aarch64-linux: with shared boringssl-0.20260413.0	23m 59s
aarch64-linux: with shared openssl-3.6.1	24m 10s
aarch64-linux: with shared openssl-4.0.0	24m 51s
aarch64-linux: with shared openssl-3.5.5	23m 31s
aarch64-linux: with shared openssl-3.0.19	25m 24s
aarch64-linux: with shared openssl-1.1.1w	25m 6s
	4h 7m 53s

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