Configure index in @ParameterizedTest display names

This commit prepends "[{index}] " to all custom display names
configured via @ParameterizedTest.

This provides better diagnostics between the "technical names" reported
on the CI server vs. the "display names" reported within a developer's
IDE.

See gh-23451

spring-core/src/test/java/org/springframework/core/io/buffer/AbstractDataBufferAllocatingTests.java

@@ -143,7 +143,7 @@ public abstract class AbstractDataBufferAllocatingTests {
 
 	@Retention(RetentionPolicy.RUNTIME)
 	@Target(ElementType.METHOD)
-	@ParameterizedTest(name = "{0}")
+	@ParameterizedTest(name = "[{index}] {0}")
 	@MethodSource("org.springframework.core.io.buffer.AbstractDataBufferAllocatingTests#dataBufferFactories()")
 	public @interface ParameterizedDataBufferAllocatingTest {
 	}