Method readFileOnce

Tests/Libraries/Await/AwaitTest.cpp:697–702

        co_return Result(true);
    }

    static AwaitTask readFileOnce(AwaitEventLoop& await, const FileDescriptor& file, Span<char> readBuffer,
                                  AwaitFileReadResult& readResult)
    {
        SC_CO_TRY(co_await await.fileRead(file, readBuffer, readResult));
        co_return Result(true);
    }