Bump org.apache.kafka:kafka_2.13 from 3.3.1 to 7.8.0-ce

Bumps org.apache.kafka:kafka_2.13 from 3.3.1 to 7.8.0-ce.

---
updated-dependencies:
- dependency-name: org.apache.kafka:kafka_2.13
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

e2e-tests/pom.xml

@@ -12,7 +12,7 @@
     <artifactId>e2e-tests</artifactId>
 
     <properties>
-        <kafka.version>3.8.0</kafka.version>
+        <kafka.version>7.8.0-ce</kafka.version>
         <contract>${project.version}</contract>
         <maven.compiler.release>21</maven.compiler.release>
         <maven.surefire.release>3.5.1</maven.surefire.release>