Bump MSTest.TestAdapter from 2.1.1 to 2.1.2 in /src/Radical.Tests
Bump MSTest.TestAdapter from 2.1.1 to 2.1.2 in /src/Radical.Tests

Bumps [MSTest.TestAdapter](https://github.com/microsoft/testfx) from 2.1.1 to 2.1.2.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](https://github.com/microsoft/testfx/compare/v2.1.1...v2.1.2)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
RadicalFx/radical