Fix DateTime.Parse with AssumeUniversal style option

[tarekgh]

Fixes #111689

[Copilot]

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (1)

src/libraries/System.Runtime/tests/System.Runtime.Tests/System/DateTimeTests.cs:2698

• The test should verify both the date and time parts of the parsed DateTime to ensure it is correctly parsed and in UTC. Consider adding assertions to check the time part as well.

Assert.True(utcNow1.Date <= dt.Date && dt.Date <= utcNow2.Date);

[tarekgh]

/ba-g no real failure is reported