Migrate to xunit v3

[martincostello]

Migrate the tests to xunit v3.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.48%. Comparing base (21dd856) to head (614bdf1).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1531   +/-   ##
=======================================
  Coverage   93.48%   93.48%           
=======================================
  Files          49       49           
  Lines         599      599           
  Branches       53       53           
=======================================
  Hits          560      560           
  Misses         23       23           
  Partials       16       16           

Flag	Coverage Δ
linux	93.48% <ø> (ø)
macos	93.48% <ø> (ø)
windows	93.48% <ø> (ø)

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[martincostello]

/deploy

[github-actions]

🧪 Tests for deployment to dev passed ✅

[github-actions]

Payload	Duration	Billed Duration	Memory Size	Max Memory Used	Init Duration	Trace
Stop	1239.278	1605	192	85	365.712	🔗
Help	27.021	28	192	85	-	🔗
SessionEnded	54.396	55	192	86	-	🔗
Launch	27.511	28	192	86	-	🔗
UnknownIntent	26.708	27	192	86	-	🔗
Cancel	27.545	28	192	87	-	🔗
Disruption	2385.301	2810	192	99	424.66	🔗
Status	1546.852	1547	192	99	-	🔗