fixed cleanup logic to rabbit connections

[gabo1208]

It was hanging when a connection was closed and its associated channel close method was called.
More details on this issue

Changes

• 🐛 Fixed bug where the broker ingress was not reconnecting after the connection or channel with RabbitMQ was closed
• 🧹 Small refactor to rabbit setup pkg

/kind bug

Fixes #764

Release Note

- 🐛 Fixed bug where the broker ingress was not reconnecting after the connection or channel with RabbitMQ was closed

[codecov]

Codecov Report

Merging #778 (866487a) into main (64ec508) will increase coverage by 0.06%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##             main     #778      +/-   ##
==========================================
+ Coverage   75.27%   75.34%   +0.06%     
==========================================
  Files          39       39              
  Lines        2621     2620       -1     
==========================================
+ Hits         1973     1974       +1     
+ Misses        583      581       -2     
  Partials       65       65              

Impacted Files	Coverage Δ
pkg/rabbit/setup.go	58.00% <75.00%> (+8.98%)	⬆️
pkg/rabbit/message.go	68.90% <0.00%> (-2.53%)	⬇️

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[gab-satchi]

/lgtm

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gab-satchi, gabo1208

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