Evaluate upgrading Groovy to 5.0.0 under JDK 11 runtime constraint (#13679)

### Evaluation Purpose
This PR is an extension to another PR  ( #13671 ) and evaluates upgrading the Groovy engine from **4.0.x to 5.0.0 (earliest GA)** with a focus on validating **SkyWalking’s JDK 11 runtime compatibility guarantee**.

Groovy is used as a runtime dependency in several OAP backend modules, so this change is evaluated strictly from a **compatibility and policy** perspective.

### Verification Results
Local evaluation was performed using **JDK 21 for build** and **JDK 11 for runtime**, targeting the primary Groovy consumers (`log-analyzer` and `meter-analyzer`).

- **Build Status:** SUCCESS (built with JDK 21)
- **Runtime Compatibility:**  
  Verified that the **OAP distribution starts successfully on JDK 11** with Groovy 5.0.0.

  - *Test:* Built full distribution (`-Pdist`) on JDK 21, then launched OAP via `oapService.bat` using JDK 11.
  - *Result:* Server started successfully and bound ports without any `UnsupportedClassVersionError` or JVM compatibility failures.

- **Tests Passed:**
  - `oap-server/analyzer/log-analyzer` (LAL script parsing)
  - `oap-server/analyzer/meter-analyzer` (MAL script execution)

### Key Findings
- No compilation issues observed in backend modules.
- No Groovy/Spock incompatibilities detected in the existing test suite.
- Groovy 5.0.0 does not introduce runtime incompatibilities with JDK 11 based on the evaluated scope.

### Scope Notes
This PR is intended solely as a **compatibility evaluation** and does not include test refactors, additional Groovy 5.x upgrades, or behavioral changes.

Author: Siman-hub

dist-material/release-docs/LICENSE

@@ -347,7 +347,7 @@ The text of each license is the standard Apache 2.0 license.
     https://mvnrepository.com/artifact/org.apache.curator/curator-framework/4.3.0 Apache-2.0
     https://mvnrepository.com/artifact/org.apache.curator/curator-recipes/4.3.0 Apache-2.0
     https://mvnrepository.com/artifact/org.apache.curator/curator-x-discovery/4.3.0 Apache-2.0
-    https://mvnrepository.com/artifact/org.apache.groovy/groovy/4.0.15 Apache-2.0
+    https://mvnrepository.com/artifact/org.apache.groovy/groovy/5.0.3 Apache-2.0
     https://mvnrepository.com/artifact/org.apache.httpcomponents/httpasyncclient/4.1.5 Apache-2.0
     https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient/4.5.13 Apache-2.0
     https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore/4.4.16 Apache-2.0

docs/en/changes/changes.md

@@ -3,6 +3,7 @@
 #### Project
 * Fix E2E test metrics verify: make it failure if the metric values all null.
 * Add `CLAUDE.md` as AI assistant guide for the project.
+* Upgrade Groovy to 5.0.3 in OAP backend.
 
 #### OAP Server
 

oap-server-bom/pom.xml

@@ -60,7 +60,7 @@
         <freemarker.version>2.3.31</freemarker.version>
         <javaassist.version>3.25.0-GA</javaassist.version>
         <vavr.version>0.10.3</vavr.version>
-        <groovy.version>4.0.15</groovy.version>
+        <groovy.version>5.0.3</groovy.version>
         <mvel.version>2.4.8.Final</mvel.version>
         <commons-beanutils.version>1.11.0</commons-beanutils.version>
         <flatbuffers-java.version>1.12.0</flatbuffers-java.version>