Fix issue when multiple test processes output data to neotest. #488
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I was experimenting with https://github.com/HiPhish/neotest-busted and I had issues with data being corrupted when read after multiple commands to busted completed concurrently. Seems like the issue is with multiple calls to uv_fs_write. According to libuv/libuv#3820 (comment), the responsabilty to control concurrent access to same file must lie with the user.
NVIM v0.11.0-nightly+1fb606b
Build type: Release
LuaJIT 2.1.1713773202
OSX