net/kafkacat: Update to 1.4.0

Changelog:

Enhancements:

• Consumer: Add support for printing message headers (-f ".. %h.. \n")
• Producer: Add support for specifying message headers (-H name=value)
• Emit current controllerId in metadata output, if supported
• Add -F <file> to read config from file. Defaults to $KAFKACAT_CONFIG or ~/.config/kafkacat.conf. With some support for translating Java config properties to librdkafka counterparts.
• Support Fixed key (-k ..)

Fixes:

• Make sure topic configuration is applied first
• JSON: emit NULL keys and values as null rather than empty string
• Fix tstype json output
• Honour -c count in consumer mode by yielding

https://github.com/edenhill/kafkacat/releases/tag/1.4.0

PR: 237156
Submitted by: Sergey Akhmatov (maintainer)
Approved by: mentors (implicit)