Revert Mockito 5 upgrade that breaks native method mocking

Mockito 5 cannot mock native methods like RandomAccessFile.length(),
causing ResumableRandomAccessFileListenerTest to fail with
"Stream Closed" on all platforms. Revert to Mockito 4.11.0 and add
dependabot ignore rule for the major version bump.

Author: hyperxpro

.github/dependabot.yml

@@ -17,6 +17,8 @@ updates:
         update-types: ["version-update:semver-major"]
       - dependency-name: "org.apache.tomcat.embed:tomcat-embed-core"
         update-types: ["version-update:semver-major"]
+      - dependency-name: "org.mockito:mockito-core"
+        update-types: ["version-update:semver-major"]
 
   - package-ecosystem: "github-actions"
     directory: "/"

client/pom.xml

@@ -33,7 +33,7 @@
         <jetty.version>11.0.26</jetty.version>
         <tomcat.version>10.1.50</tomcat.version>
         <commons-io.version>2.21.0</commons-io.version>
-        <mockito.version>5.23.0</mockito.version>
+        <mockito.version>4.11.0</mockito.version>
         <hamcrest.version>3.0</hamcrest.version>
         <kerby.version>2.1.1</kerby.version>
     </properties>