Sync for file operations

[struschev]

Hi! This small patch adds the ability to use fsync in file ioengines, more specifically in: fileoperations, falloc, and ftruncate.

[struschev]

Judging by the logs, the CI launch was generally successful, but for some reason a couple of tests failed (not a compilation or a test error)

[struschev]

Seems like Github runner go out of space

System.IO.IOException: No space left on device : '/home/runner/actions-runner/cached/_diag/Worker_20251124-085308-utc.log' at System.IO.RandomAccess.WriteAtOffset(SafeFileHandle handle, ReadOnlySpan`1 buffer, Int64 fileOffset) at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder) at System.Diagnostics.TextWriterTraceListener.Flush() at GitHub.Runner.Common.HostTraceListener.WriteHeader(String source, TraceEventType eventType, Int32 id) at System.Diagnostics.TraceSource.TraceEvent(TraceEventType eventType, Int32 id, String message) at GitHub.Runner.Worker.Worker.RunAsync(String pipeIn, String pipeOut) at GitHub.Runner.Worker.Program.MainAsync(IHostContext context, String[] args) System.IO.IOException: No space left on device : '/home/runner/actions-runner/cached/_diag/Worker_20251124-085308-utc.log' at System.IO.RandomAccess.WriteAtOffset(SafeFileHandle handle, ReadOnlySpan`1 buffer, Int64 fileOffset) at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder) at System.Diagnostics.TextWriterTraceListener.Flush() at GitHub.Runner.Common.HostTraceListener.WriteHeader(String source, TraceEventType eventType, Int32 id) at System.Diagnostics.TraceSource.TraceEvent(TraceEventType eventType, Int32 id, String message) at GitHub.Runner.Common.Tracing.Error(Exception exception) at GitHub.Runner.Worker.Program.MainAsync(IHostContext context, String[] args) Unhandled exception. System.IO.IOException: No space left on device : '/home/runner/actions-runner/cached/_diag/Worker_20251124-085308-utc.log' at System.IO.RandomAccess.WriteAtOffset(SafeFileHandle handle, ReadOnlySpan`1 buffer, Int64 fileOffset) at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder) at System.Diagnostics.TextWriterTraceListener.Flush() at System.Diagnostics.TraceSource.Flush() at GitHub.Runner.Common.Tracing.Dispose(Boolean disposing) at GitHub.Runner.Common.Tracing.Dispose() at GitHub.Runner.Common.TraceManager.Dispose(Boolean disposing) at GitHub.Runner.Common.TraceManager.Dispose() at GitHub.Runner.Common.HostContext.Dispose(Boolean disposing) at GitHub.Runner.Common.HostContext.Dispose() at GitHub.Runner.Worker.Program.Main(String[] args)

[sitsofe]

(I reran the failed jobs)