Add test project for Tools.Common

[isra-fel]

Description

This test project is to test code in #11864
Need to add more test cases.

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• The appropriate ChangeLog.md file(s) has been updated:
  • For any service, the ChangeLog.md file can be found at src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md
  • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header -- no new version header should be added
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• For public API changes to cmdlets:
  • a cmdlet design review was approved for the changes in this repository (Microsoft internal only)
  • the markdown help files have been regenerated using the commands listed here

[adxsdkps]

Can one of the admins verify this patch?

[isra-fel]

@dingmeng-xue I wrote a test project for Tools.Common and added a few test cases.
It is not run during CI, as other test projects in tools/, but you can run it in VS.

[dingmeng-xue]

I think locally run is good enough. We don't need to enable test per CI for the time being.