Fix test failures for release/10.2 to run on pipeline

[muskan124947]

The changes update the client certificate authentication tests to ensure that the encryption settings are correctly validated.

• In ClientCertificateAuthenticationTest.java, test methods were renamed (from testEncryptTrusted to testEncryptOn and from testEncryptUntrusted to testEncryptOff) for clarity.
• Connection strings were adjusted to properly set encryption flags, with assertions updated to use assertTrue for encryption on and assertFalse for encryption off.
• Minor formatting improvements were made, including consolidating try-with-resources and enhancing comments, while adding the missing import for assertFalse.