build: Apache groovy 4.0.9 (micronaut-projects#8784)

without `@CompileDynamic`

```
 [Static type checking] - Non-static method java.lang.Object#hashCode cannot be called from static context
 @ line 99, column 16.
           return visitor.getClass().hashCode()
                  ^
```

gradle/libs.versions.toml

@@ -60,7 +60,7 @@ wiremock = "2.33.2"
 # Versions which start with managed- are managed by Micronaut in the sense
 # that they will appear in the Micronaut BOM as <properties>
 #
-managed-groovy = "4.0.6"
+managed-groovy = "4.0.9"
 managed-jakarta-annotation-api = "2.1.1"
 managed-jackson = "2.14.0"
 managed-jackson-databind = "2.14.1"

inject-groovy/src/main/groovy/io/micronaut/ast/groovy/visitor/LoadedVisitor.groovy

@@ -15,6 +15,7 @@
  */
 package io.micronaut.ast.groovy.visitor
 
+import groovy.transform.CompileDynamic
 import groovy.transform.CompileStatic
 import io.micronaut.core.annotation.AnnotationMetadata
 import io.micronaut.core.annotation.Internal
@@ -94,6 +95,7 @@ class LoadedVisitor implements Ordered {
         return true
     }
 
+    @CompileDynamic
     @Override
     int hashCode() {
         return visitor.getClass().hashCode()

src/main/docs/guide/introduction/whatsNew.adoc

@@ -1,8 +1,13 @@
 //Micronaut {version} includes the following changes:
 == 4.0.0
 
+=== Apache Groovy 4.0
+
+Micronaut Framework 4.x supports https://groovy-lang.org/releasenotes/groovy-4.0.html[Apache Groovy 4.0].
+
 === Core Changes
 
+
 * <<virtualThreads, Support for Virtual Threads>>
 
 ==== Injection of Maps