Investigate DoubleWrites in our builds

[Youssef1313]

The binlogs are showing some DoubleWrites in our builds. We should investigate this and try to eliminate them, if possible.

For info, see:

https://github.com/KirillOsenkov/MSBuildStructuredLog/wiki/Double%20write%20detection https://www.meziantou.net/detecting-double-writes-in-msbuild-using-the-binlog.htm

[jeromelaban]

Let's do this!

[Youssef1313]

Needs https://github.com/dotnet/msbuild/issues/9141 for better analysis.

[Youssef1313]

With disabled hardlinks, the only double write I see is