Update failing MBCS tests based on CLDR 42.0

[smlambert]

Test failures affecting JDK22+, as described in https://github.com/adoptium/aqa-tests/issues/5141#issuecomment-1997371642, 3 test targets are failing (MBCS_Tests_unicode_linux, MBCS_Tests_codepoint_linux and MBCS_Tests_datetime_formatter).

The analysis in https://github.com/adoptium/aqa-tests/issues/5141#issuecomment-2003999091 rightly indicates that the changes in CLDR 42.0 warrant an update to these tests.

(May involve updating the unicode test data used for testcases as well).

If this can not happen prior to this week's release, we should temporarily disable these tests in the v1.0.1-release branch.