gh-148850: Fix memory sanitizer false positive in os.getrandom (GH-14… #2325

Job	Run time
x86_64-unknown-linux-gnu/gcc-free-threading	7m 49s
aarch64-apple-darwin/clang	10m 13s
aarch64-unknown-linux-gnu/gcc	6m 55s
x86_64-unknown-linux-gnu/gcc	9m 43s
x86_64-apple-darwin/clang	1h 0m 25s
	1h 35m 5s

Provide feedback