Fix bundle build workflow

[adam-cattermole]

Porting of the changes from https://github.com/Kuadrant/authorino-operator/tree/v0.9.0 to fix the release workflow and manifests building.

[adam-cattermole]

Sure latest commit added where I ran make manifests bundle CHANNELS=stable DEFAULT_CHANNEL=stable

[adam-cattermole]

Actually, maybe I should set CHANNELS?=stable by default in the Makefile, the default with --overwrite behaviour from operator-sdk is to set it to alpha when not defined

[adam-cattermole]

Oh maybe the same should be true for DEFAULT_CHANNEL - verify fails as it does not set either of these by default

[codecov-commenter]

Codecov Report

Merging #153 (f5ff784) into main (aee73cf) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #153   +/-   ##
=======================================
  Coverage   62.85%   62.85%           
=======================================
  Files           1        1           
  Lines         735      735           
=======================================
  Hits          462      462           
  Misses        222      222           
  Partials       51       51           

Flag	Coverage Δ
unit	62.85% <ø> (ø)

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

:mega: We’re building smart automated test selection to slash your CI/CD build times. Learn more

[adam-cattermole]

I have changed the behaviour to default to alpha on the main branch. When we provide the DEFAULT_CHANNEL and CHANNELS as part of the release workflow the bundle.Dockerfile and bundle annotations will be updated to the correct channels.

If we want to build catalogs from main branch and test the upgrade from a previously released bundle version we need to specify stable for the channels above when building the bundle from main.