GH-9996: Migrating tests to Junit Jupiter and Deprecate Junit4 utilities

Fixes: https://github.com/spring-projects/spring-integration/issues/9996

Signed-off-by: Jiandong Ma <jiandong.ma.cn@gmail.com>

src/reference/antora/modules/ROOT/pages/testing.adoc

@@ -114,20 +114,18 @@ public void testWithEntityClass() throws Exception {
 
 The `org.springframework.integration.test.support` package contains various abstract classes that you should implement in target tests
 
-* https://docs.spring.io/spring-integration/api/org/springframework/integration/test/support/AbstractRequestResponseScenarioTests.html[`AbstractRequestResponseScenarioTests`]
+* https://docs.spring.io/spring-integration/api/org/springframework/integration/test/support/AbstractRequestResponseScenarioTest.html[`AbstractRequestResponseScenarioTest`]
 * https://docs.spring.io/spring-integration/api/org/springframework/integration/test/support/AbstractResponseValidator.html[`AbstractResponseValidator`]
-* https://docs.spring.io/spring-integration/api/org/springframework/integration/test/support/LogAdjustingTestSupport.html[`LogAdjustingTestSupport`] (Deprecated)
 * https://docs.spring.io/spring-integration/api/org/springframework/integration/test/support/MessageValidator.html[`MessageValidator`]
 * https://docs.spring.io/spring-integration/api/org/springframework/integration/test/support/PayloadValidator.html[`PayloadValidator`]
 * https://docs.spring.io/spring-integration/api/org/springframework/integration/test/support/RequestResponseScenario.html[`RequestResponseScenario`]
-* https://docs.spring.io/spring-integration/api/org/springframework/integration/test/support/SingleRequestResponseScenarioTests.html[`SingleRequestResponseScenarioTests`]
+* https://docs.spring.io/spring-integration/api/org/springframework/integration/test/support/SingleRequestResponseScenarioTest.html[`SingleRequestResponseScenarioTest`]
 
-[[test-junit-rules]]
-=== JUnit Rules and Conditions
+[[test-junit-conditions]]
+=== JUnit Conditions
 
-The `LongRunningIntegrationTest` JUnit 4 test rule is present to indicate if test should be run if `RUN_LONG_INTEGRATION_TESTS` environment or system property is set to `true`.
+The `@LongRunningTest` conditional annotation is present to indicate if test should be run if `RUN_LONG_INTEGRATION_TESTS` environment or system property is set to `true`.
 Otherwise, it is skipped.
-For the same reason since version 5.1, a `@LongRunningTest` conditional annotation is provided for JUnit 5 tests.
 
 [[hamcrest-and-mockito-matchers]]
 === Hamcrest and Mockito Matchers
@@ -231,7 +229,7 @@ After test is performed you can restore the state of endpoint beans to the real
 
 [source,java]
 ----
-@After
+@AfterEach
 public void tearDown() {
     this.mockIntegrationContext.resetBeans();
 }

src/reference/antora/modules/ROOT/pages/whats-new.adoc

@@ -17,6 +17,8 @@ Java 17 is still baseline, but Java 24 is supported.
 [[x7.0-general]]
 == General Changes
 
+Junit 4 Based Support Components are deprecated.
+
 [[x7.0-new-components]]
 == New Components