update checkpoint passwordUtil test aes128(v0) passwords to aes256(v1)

[Zech-Hein]

• I have considered the risk of behavior change or other zero migration impact (https://github.com/OpenLiberty/open-liberty/w[iki/Behavior-Changes).
• [] If this PR fixes an Issue, the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN" (verify release bug label if applicable: https://github.com/OpenLiberty/open-liberty/wiki/Open-Liberty-Conventions).
• [] If this PR resolves an external Known Issue (including APARS), the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN".

For: #29659

[Zech-Hein]

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[Zech-Hein]

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[tjwatson]

LGTM

Tested locally with an InstantOn enabled environment. The modified tests pass. Thanks!

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[Zech-Hein]

PB completed with the tests passing. There was an intermittent failure that was unrelated to these changes. Proceeding with merge.