build(bpmn-model): replaces clirr with revapi

Replaces clirr with revapi, keeping the same exemptions as before:
ignoring new methods in all Zeebe extensions, as they aren't meant to be
implemented but only consumed.

(cherry picked from commit 23a2e95)

bpmn-model/pom.xml

@@ -55,17 +55,14 @@
   <build>
     <plugins>
       <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>clirr-maven-plugin</artifactId>
+        <groupId>org.revapi</groupId>
+        <artifactId>revapi-maven-plugin</artifactId>
         <configuration>
-          <ignored>
-            <ignored>
-              <!-- ignore new methods in the Zeebe element instance interfaces -->
-              <className>io/camunda/zeebe/model/bpmn/instance/zeebe/*</className>
-              <differenceType>7012</differenceType>
-              <method>*</method>
-            </ignored>
-          </ignored>
+          <analysisConfigurationFiles>
+            <configurationFile>
+              <path>revapi.json</path>
+            </configurationFile>
+          </analysisConfigurationFiles>
         </configuration>
       </plugin>
     </plugins>

bpmn-model/revapi.json

@@ -0,0 +1,18 @@
+[
+  {
+    "extension": "revapi.differences",
+    "configuration": {
+      "justification": "Ignore new methods for Zeebe extensions, as these are not meant to be implemented but simply consumed; as such, new methods are perfectly fine to add",
+      "ignore": true,
+      "differences": [
+        {
+          "code": "java.method.addedToInterface",
+          "new": {
+            "matcher": "java-package",
+            "match": "/io\\.camunda\\.zeebe\\.model\\.bpmn\\.instance\\.zeebe(\\..*)?/"
+          }
+        }
+      ]
+    }
+  }
+]