Fix compile warning in spring-security-test

[kmw10693]

#18440

Here's an explanation of the compiler warnings fixed in this PR:

Fixed Warnings
1. WebSecurityConfigurationTests.java

Issue: Raw type warning due to missing generic type specification in ClassUtils.getMethod() call

Fix: Added (Class<?>[]) cast to ensure generic type safety

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2. OneTimeTokenAuthenticationTokenTests.java

Issue: Warning from using deprecated functionality

Fix: Added @SuppressWarnings("removal") annotation to suppress the deprecation warning

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3. OneTimeTokenReactiveAuthenticationManagerTests.java

Issue: Deprecation warnings from using deprecated OneTimeTokenAuthenticationToken or related deprecated APIs throughout the test methods

Fix: Added @SuppressWarnings("removal") annotation to each test method that uses the deprecated functionality

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4. AuthorityAuthorizationManagerTests.java

Issue: Ambiguous method call warnings. Passing null directly to varargs methods like hasAnyRole(String...) and hasAnyAuthority(String...) creates ambiguity - the compiler can't determine if null represents a null array or an array containing a single null element

Fix: Added explicit (String[]) cast to clarify that null represents a null array, not a single null element

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5. DefaultMethodSecurityExpressionHandlerKotlinTests.kt

Issue: Kotlin's "unchecked cast" warnings when casting generic types. The compiler cannot verify at runtime that the cast to parameterized types like Map<String, String>, Collection, Array, or Stream is type-safe, since generic type information is erased at runtime
Fix: Added @Suppress("UNCHECKED_CAST") annotation to explicitly acknowledge and suppress these unavoidable warnings

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6/ DelegatingAuthenticationEntryPointTests.java

Issue: Deprecation warnings from using the deprecated DelegatingAuthenticationEntryPoint class or its constructors/methods

Fix: Added @SuppressWarnings("removal") annotation to each test method that uses the deprecated functionality

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7. OneTimeTokenAuthenticationFilterTests.java
Issue: Deprecation warnings from using deprecated OneTimeTokenAuthenticationFilter or related one-time token authentication APIs

Fix: Added @SuppressWarnings("removal") annotation to each test method that uses the deprecated functionality

[rwinch]

Thanks for the Pull Request! This is will be merged into main when the build passes 😄

[kmw10693]

Thanks for the Pull Request! This is will be merged into main when the build passes 😄

Thanks! I fixed the code format style