VsTestToolsInstallerInstalledToolLocation: Path to CodeCoverage.exe may contain net462 instead of net451

[martin-strecker-sonarsource]

Reported by https://community.sonarsource.com/t/75717

If https://github.com/microsoft/azure-pipelines-tasks/tree/master/Tasks/VsTestPlatformToolInstallerV1 is used to install CodeCoverage.exe the VsTestToolsInstallerInstalledToolLocation environment variable is pointing to a directory containing all the test tools. We use this as a base path to find CodeCoverage.exe. We look at this position:

sonar-scanner-msbuild/src/SonarScanner.MSBuild.TFS.Classic/BinaryToXmlCoverageReportConverter.cs

Line 52 in 85b844f

private const string VsTestToolPlatformInstallerPathToExe = @"tools\net451\Team Tools\Dynamic Code Coverage Tools\CodeCoverage.exe";

According to https://community.sonarsource.com/t/75717/5 the path can also be @"\tools\net462\Team Tools\Dynamic Code Coverage Tools\CodeCoverage.exe".

We need to do the lookup in that location too.

Background:
Packages are installed via https://www.nuget.org/packages/Microsoft.TestPlatform In version bump 17.3.2 -> 17.4.0 the path of the coverage tool changed.