An Allure adapter for MSTest

#### Motivation
MSTest is among the three most popular unit test frameworks for C#. It's comparable to NUnit and xUnit.net by download counts (daily average for the last 6 weeks):

- MSTest: 150k
- NUnit: 210k
- xUnit.net: 343k

While .trx files generated with `dotnet test --logger trx` are natively supported by both Allure Report and Allure TestOps, a dedicated adapter is missing making it impossible to add Allure-related data to the report.

#### Other information

Previously we were unable to implement such an adapter due to the lack of an extension API in MSTest. Now, in MSTest v2 there are some extension points that we can utilize. They're documented here: https://github.com/microsoft/testfx/tree/main/docs/RFCs. There is also an undocumented extension API that's worth taking a look at: https://github.com/search?q=repo%3Amicrosoft%2Ftestfx+IExtension&type=code&p=1

We should check these APIs on whether they allow us to implement an adapter and then proceed with the issue.

Start by reviewing the MSTest v2 extension points in the linked testfx RFCs and the undocumented IExtension API search results. Determine whether these APIs support an Allure adapter; done means establishing that feasibility and, if supported, implementing MSTest integration that adds Allure-related data to reports.

Written by the indexing model from the issue text.