Binlog redacting - properly process embedded files

[JanKrivanek]

Context

#8400
Prototype was created: https://github.com/JanKrivanek/MSBuildBinlogRedactor (it currently needs a private MSBuild nuget - as the exposed MSBuild api is not yet merged)
The prototype properly replies the binary events - it however doesn't care about the embadded files.

Goal

All supplemental content of the original binlog (embedded files, anything else?) is copied over to target binlog file aftery replying.
This should eas well work when post-processing (replying) binlog that was produced on a different machine.
Nice to have - the embadded files are as well processed as text data and scanned for sensitive data occurence.

[JanKrivanek]

Setup:

• https://github.com/JanKrivanek/MSBuildBinlogRedactor
• dotnet build
• dotnet tests
• The added 2 tests in https://github.com/JanKrivanek/MSBuildBinlogRedactor/blob/main/test/Microsoft.Build.BinlogRedactor.Tests/BinlogRedactorTests.cs are failing - because the redacting doesn't properly honor other data than events (and hence the redacting is losing content and is undeterministic)

[JanKrivanek]

The proposal fix for this is done in the redactor repo: dotutils/MSBuild.BinlogRedactor#2

It requires changes in MSBuild repo - proposed in #9219, untill those are accepted the work cannot be considered done.

Alternative approach is implementation whole functionality in separate repo (this option will be approached as well - via contribution to binlog viewer, as it has potential for quicker and lower-risk piloting and feedback on changes)

[JanKrivanek]

Near completition. PR: #9307