Bump kafka-python and kazoo

[masci]

What does this PR do?

Per kafka_consumer check requirements.

Sister PRs (hold until those are merged):

• Bump kazoo to 2.6.0 dd-agent#3801
• Bump Kazoo to 2.6.0 omnibus-software#279

Motivation

Requirements bumped in #2728 and #2729

Review checklist

• PR has a meaningful title or PR has the no-changelog label attached
• Feature or bugfix has tests
• Git history is clean
• If PR impacts documentation, docs team has been notified or an issue has been opened on the documentation repo
• If PR adds a configuration option, it has been added to the configuration file.

[codecov-io]

Codecov Report

Merging #2766 into master will decrease coverage by 9.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2766      +/-   ##
==========================================
- Coverage   84.71%   75.63%   -9.08%     
==========================================
  Files         657       45     -612     
  Lines       37482     3263   -34219     
  Branches     4506      386    -4120     
==========================================
- Hits        31753     2468   -29285     
+ Misses       4407      699    -3708     
+ Partials     1322       96    -1226

[olivielpeau]

Thanks for the ping, please make related changes to the Agent 5 build:

• https://github.com/DataDog/dd-agent/blob/5.30.0/requirements.txt#L24
• https://github.com/DataDog/omnibus-software/blob/master/config/software/kazoo.rb

I've checked the Agent 6 build and it doesn't seem to define these deps separately (i.e. they don't appear here: https://github.com/DataDog/datadog-agent/blob/6.8.0/omnibus/config/software/datadog-agent-integrations.rb#L11-L24)