⚠️ use managedclustraddon install namespace when addondeploymentconfig not set

[zhujian7]

Summary

Currently, when deploying an addonTemplate type addon, if the addondeploymentconfig is not set, we will deploy the resources into the namespace of the first deployment/daemonset defined in the addonTemplate. This PR changes to deploy the resources into the namespace of managedclusteraddon.spec.installnamespace.

Related issue(s)

Fixes #

[openshift-ci]

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This pull-request has been approved by: zhujian7

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[zhujian7]

/hold
Not sure if this change is necessary as we are going to deprecate the managedclusteraddon.spec.installnamespace

[qiujian16]

we should use the namespace in status

[codecov]

Codecov Report

Attention: Patch coverage is 84.21053% with 6 lines in your changes missing coverage. Please review.

Project coverage is 64.18%. Comparing base (fb5ba3a) to head (3120a30).

Files with missing lines	Patch %	Lines
pkg/addon/templateagent/template_agent.go	82.85%	4 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1027      +/-   ##
==========================================
+ Coverage   64.13%   64.18%   +0.05%     
==========================================
  Files         196      196              
  Lines       19292    19297       +5     
==========================================
+ Hits        12373    12386      +13     
+ Misses       5894     5886       -8     
  Partials     1025     1025              

Flag	Coverage Δ
unit	64.18% <84.21%> (+0.05%)	⬆️

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