Add reliable check for Kafka broker being ready (#5154)

## Which problem is this PR solving?
Resolves #5148

## Description of the changes
- The previous approach used ```nc``` to check the availability of the
```Kafka port```, which was not reliable, especially when the Kafka
container was started asynchronously. The updated script now ensures a
more reliable check for Kafka readiness by attempting to list topics
using ```kafka-topics.sh``` within a loop. This modification ensures
that the script waits until Kafka is fully initialized before proceeding
with integration tests.

## How was this change tested?
- This modification ensures that the script waits until Kafka is fully
initialized before proceeding with integration tests.
- Ran ```bash scripts/kafka-integration-test.sh -k``` from the project
root.

## Checklist
- [x] I have read
https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
- [x] I have signed all commits
- [ ] I have added unit tests for the new functionality
- [x] I have run lint and test steps successfully
  - for `jaeger`: `make lint test`
  - for `jaeger-ui`: `yarn lint` and `yarn test`

Signed-off-by: Shashank Mittal <shashank.mittal.mec22@itbhu.ac.in>

scripts/kafka-integration-test.sh

@@ -35,17 +35,19 @@ interval=5
 end_time=$((SECONDS + timeout))
 
 while [ $SECONDS -lt $end_time ]; do
-    if nc -z localhost 9092; then
+    # Check if Kafka is ready by attempting to describe a topic
+    if docker exec kafka /opt/bitnami/kafka/bin/kafka-topics.sh --list --bootstrap-server localhost:9092 >/dev/null 2>&1; then
         break
     fi
     echo "Kafka broker not ready, waiting ${interval} seconds"
     sleep $interval
 done
 
 # Check if Kafka is still not available after the timeout
-if ! nc -z localhost 9092; then
+if ! docker exec kafka /opt/bitnami/kafka/bin/kafka-topics.sh --list --bootstrap-server localhost:9092 >/dev/null 2>&1; then
     echo "Timed out waiting for Kafka to start"
     exit 1
 fi
 
+# Continue with the integration tests
 make storage-integration-test