Topic.Id corrupted on windows x86

[fred-ro]

Description

Using the AdminClient describeTopic feature returned a corrupted topic.id on windows x86 environement.

How to reproduce

Just describe a topic using admin_client.describe_topics(TopicCollection(topic_names=['topic-name'])) and compare in the result the topic.id with the one returned by Java client or by the python client on Linux or MacOS.
Example:
java or python unix: 3Scf991+Q1iZVkXPFU1pyQ
python win: /////91+q1gAAAAAFU1pyQ

Checklist

Please provide the following information:

• confluent-kafka-python and librdkafka version (confluent_kafka.version() and confluent_kafka.libversion()): client 2.6.1
• Apache Kafka broker version: Any
• Client configuration: {...}
• Operating system: windows 64bits x86
• Provide client logs (with 'debug': '..' as necessary)
• Provide broker log excerpts
• Critical issue