dotnet test for MTP handling of "global" command-line options

[Youssef1313]

There are some command-line options which we think should be applied "globally" and not blindly be passed to each test application. These are:

• --config-file, --results-directory, --diagnostic-output-directory
  • If it's relative, we should transform to absolute path. Taking results directory as an example, if you do dotnet test --solution MySln.sln --results-directory TestResults in your repo root, I expect TestResults to refer to path/to/repo-root/TestResults instead of being relative to each individual executable. Same applies to all others.
  • --results-directory: done in Better handling of --results-directory #50081
  • Remaining are in progress: Implement global --config-file and --diagnostic-output-directory options for dotnet test MTP #50136
• --timeout
• --minimum-expected-tests
• --maximum-failed-tests

[Youssef1313]

@copilot Please update --config-file and --diagnostic-output-directory exactly the same way as done in #50081 (commit 8509ba4 if you cannot access PR)