Add support for `fetch.wait.max.ms` Kafka consumer config #68

Job	Run time
Construct Cxx interop matrix	5s
Unit tests / Unit tests (6.0)	2m 57s
Unit tests / Unit tests (6.1)	2m 40s
Unit tests / Unit tests (nightly-main)	4m 49s
Unit tests / Unit tests (5.9)	36s
Unit tests / Unit tests (5.10)	4m 2s
Unit tests / Unit tests (nightly-6.1)	4m 53s
Soundness / Documentation check	1m 52s
Soundness / Broken symlinks check	7s
Soundness / Format check	37s
Soundness / Unacceptable language check	6s
Soundness / API breakage check	2m 29s
Soundness / Python lint check	16s
Soundness / YAML lint check	6s
Soundness / License headers check	8s
Soundness / Shell check	38s
Cxx interop / Linux (nightly-next)	2m 10s
Cxx interop / Linux (5.10)	1m 23s
Cxx interop / Linux (6.1)	1m 40s
Cxx interop / Linux (nightly-main)	2m 4s
Cxx interop / Linux (6.0)	1m 38s
	35m 16s

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