Same as realPathFileAbsolute except allocates result.
This function has limited platform support, and using it can lead to unnecessary failures and race conditions. It is generally advisable to avoid this function entirely.
See also:
realPathFileAbsolute.realPathFile.pub fn realPathFileAbsoluteAlloc(io: Io, absolute_path: []const u8, allocator: Allocator) RealPathFileAllocError![:0]u8
pub fn realPathFileAbsoluteAlloc(io: Io, absolute_path: []const u8, allocator: Allocator) RealPathFileAllocError![:0]u8 {
var buffer: [max_path_bytes]u8 = undefined;
const n = try realPathFileAbsolute(io, absolute_path, &buffer);
return allocator.dupeSentinel(u8, buffer[0..n], 0);
}