Update security FATs to expect CWWKS1865W

[Zech-Hein]

• I have considered the risk of behavior change or other zero migration impact (https://github.com/OpenLiberty/open-liberty/wiki/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".

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Fixes build break RTC#308890

Test Failure Info

testValidAesPasswordTest_EE10_FEATURES:junit.framework.AssertionFailedError: 2026-03-02-21:34:37:957 
Exception was thrown: java.lang.Exception: Errors/warnings were found in client logs:
    at com.ibm.ws.security.client.fat.BasicTest.testValidAesPasswordTest(BasicTest.java:283)
    
Exception was thrown: java.lang.Exception: Errors/warnings were found in client logs: 
[3/6/26, 7:08:03:764 CST] 00000001 com.ibm.ws.crypto.util.PasswordCipherUtil W CWWKS1865W: One or more of your AES-encrypted passwords were encrypted without a custom encryption key. To improve the security of your stored credentials, re-encrypt them by using a custom encryption key. Be sure to store this key in a secure location. 

[Zech-Hein]

!build (view Open Liberty Personal Build - ✅ completed successfully!)

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[jacobwdv]

LGTM

[LibbyBot]

Code analysis and actions

DO NOT DELETE THIS COMMENT.

• 2 FAT files were changed, added, or removed.

• Check that the build did not break the affected FAT suite(s).

• Please describe in a separate comment how you tested your changes.