Improve integration test console output

[ArinGhazarian]

Description

This PR adds the follows two changes:

1. By default xUnit only shows the tests outputs after the test was run. This PR adds live outputs to the console during the test run (supported in xUnit Runners v2 2.8.1+), in addition to showing them after the test has completed. This helps a lot with debugging specially debugging the migration script itself.
2. We used .NET's default Process class for shelling out to run the generated powershell migration script. The problem was the we hadn't redirected the stdout and stderr so we could only see the output of the migrate-repo commands but not the script itself. Redirecting the outputs using the Process class is a bit of a hassle though and not very intuitive so instead we switched to using CliWrap which is a better alternative.

Here is a sample output that we weren't getting before but are getting now with this PR's changes:

• Did you write/update appropriate tests
• Release notes updated (if appropriate)
• Appropriate logging output
• Issue linked
• Docs updated (or issue created)
• New package licenses are added to ThirdPartyNotices.txt (if applicable)

[github-actions]

Unit Test Results

841 tests   841 ✅  20s ⏱️
  1 suites    0 💤
  1 files      0 ❌

Results for commit d00db0d.

[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
gei	81%	72%	584	✔
ado2gh	84%	78%	631	✔
Octoshift	87%	77%	1327	✔
bbs2gh	79%	74%	692	✔
Summary	84% (7124 / 8475)	75% (1648 / 2184)	3234	✔

[synthead]

LGTM!