Pin sarama version to v1.29.1

[odacremolbap]

Fixes #1421

Workarond sticks to Samara v1.29.1 so that Knative tests do not fail.
This is not intended to be permanent and should be removed when a PR akin to this gets merged.

There is also an update of the kn/hack repo which I don't think is strictly needed here, but will resolve tags from knative-v1.0.0 and on for any test that needs it.

Proposed Changes

• Pin the samara version to v1.29.1. Will need to be unpinned when it is upgraded at this repo.

[knative-prow-robot]

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[codecov]

Codecov Report

Merging #1424 (06b71c1) into main (141ddb8) will decrease coverage by 0.05%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #1424      +/-   ##
============================================
- Coverage     71.46%   71.41%   -0.06%     
  Complexity      584      584              
============================================
  Files           100      100              
  Lines          3964     3964              
  Branches        166      166              
============================================
- Hits           2833     2831       -2     
  Misses          915      915              
- Partials        216      218       +2     

Flag	Coverage Δ
java-unittests	82.28% <ø> (-0.11%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...e/eventing/kafka/broker/core/file/FileWatcher.java	75.64% <0.00%> (-5.13%)	⬇️
...dispatcher/impl/consumer/BaseConsumerVerticle.java	93.10% <0.00%> (+6.89%)	⬆️

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[odacremolbap]

/assign @devguyio

[odacremolbap]

/retest

[pierDipi]

Hi @odacremolbap, I sent a PR to bump Sarama to 1.30 #1435

[odacremolbap]

Thanks so much @pierDipi
Closing this.