Fix staircase in logger

[nohwnd]

Use settings from xslt which will set the output mode to HTML and will emit <div></div> instead of <div /> which is not a valid HTML syntax (but is valid XML syntax).

Fix #4754

[nohwnd]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[Evangelink]

@nohwnd looks like there is a test to fix:

Failed HtmlLoggerWithFriendlyNameContainsExpectedContent (Row: 0, Runner = netcoreapp3.1, TargetFramework = net462, InProcess) [3 s]
  Error Message:
   Test method Microsoft.TestPlatform.AcceptanceTests.LoggerTests.HtmlLoggerWithFriendlyNameContainsExpectedContent threw exception: 
System.Xml.XmlException: The 'br' start tag on line 5 position 83 does not match the end tag of 'div'. Line 5, position 88.
  Stack Trace:
      at System.Xml.XmlTextReaderImpl.Throw(Exception e)
   at System.Xml.XmlTextReaderImpl.Throw(String res, String[] args)
   at System.Xml.XmlTextReaderImpl.ThrowTagMismatch(NodeData startTag)
   at System.Xml.XmlTextReaderImpl.ParseEndElement()
   at System.Xml.XmlTextReaderImpl.ParseElementContent()
   at System.Xml.XmlLoader.LoadNode(Boolean skipOverWhitespace)
   at System.Xml.XmlLoader.LoadDocSequence(XmlDocument parentDoc)
   at System.Xml.XmlDocument.Load(XmlReader reader)
   at System.Xml.XmlDocument.Load(String filename)
   at Microsoft.TestPlatform.AcceptanceTests.LoggerTests.HtmlLoggerWithFriendlyNameContainsExpectedContent(RunnerInfo runnerInfo) in /_/test/Microsoft.TestPlatform.Acceptance.IntegrationTests/LoggerTests.cs:line 73