Fix kafka_client_api_version

[ian28223]

What does this PR do?

fixes an issue when pinning the api_version.

2 issues:

• api_version expects a tuple but kafka_client_api_version is a string
• there is a bug with KafkaAdminClient where pinning any api_version will raise an IncompatibleBrokerVersion. Setting api_version=None would be a temporary fix.

Motivation

found bug while investigating something.

Additional Notes

• Created a PR over at kafka-python to fix pinning api_version for KafkaAdminClient.
  • Fixes KafkaAdminClient returning IncompatibleBrokerVersion when passing an api_version dpkp/kafka-python#1953
• Related: pinning the api_version in KafkaAdminClient can fail dpkp/kafka-python#1675

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached

[codecov]

Codecov Report

Merging #5007 into master will decrease coverage by 10.54%.
The diff coverage is 50%.

Impacted Files	Coverage Δ
...mer/datadog_checks/kafka_consumer/legacy_0_10_2.py	56.42% <50%> (ø)
...er/datadog_checks/kafka_consumer/kafka_consumer.py	69.39% <50%> (ø)
vertica/tests/metrics.py
...checks_dev/tests/plugin/test_environment_runner.py
riakcs/datadog_checks/riakcs/riakcs.py
oracle/tests/test_oracle.py
...r/datadog_checks/openstack_controller/__about__.py
twistlock/datadog_checks/twistlock/twistlock.py
linkerd/datadog_checks/linkerd/linkerd.py
...oller/datadog_checks/openstack_controller/utils.py
... and 862 more

[ian28223]

Alternatively, can we path kafka-python the same as how we did it with jaydebeapi (DataDog/datadog-agent#4402)?

we just need to insert 1 line at kafka/admin/client.py https://github.com/dpkp/kafka-python/pull/1953/files
then we can keep pinning the api_version in https://github.com/DataDog/integrations-core/pull/5007/files#diff-deed983f73a04522ac621d7f6d0c8403R132-R133