Package Plugin Tests: Wait for App to be paused before updating kapp-controller configmap

[shyaamsn]

What this PR does / why we need it

Package Plugin Tests: Wait for App to be paused before updating kapp-controller configmap.

There is a race condition that sometimes App is not paused and kapp-controller configmap changes are reverted. Hence we are waiting for App to be paused to avoid this race condition.

Which issue(s) this PR fixes

Fixes #

Describe testing done for PR

Tested package plugin tests on classy clusters. Legacy cluster tests would be part of github pipeline testing

Release note

Package Plugin Tests: Wait for App to be paused before updating kapp-controller configmap.

Additional information

Special notes for your reviewer

[codecov]

Codecov Report

Merging #4223 (ac9cf31) into main (df0d0b3) will decrease coverage by 0.88%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4223      +/-   ##
==========================================
- Coverage   49.28%   48.39%   -0.89%     
==========================================
  Files         451      481      +30     
  Lines       44602    46724    +2122     
==========================================
+ Hits        21982    22612     +630     
- Misses      20540    21981    +1441     
- Partials     2080     2131      +51     

Impacted Files	Coverage Δ
packageclients/pkg/packageclient/package_update.go	83.57% <0.00%> (-1.43%)	⬇️
cmd/cli/plugin/tkr/v1alpha3/os.go	73.50% <0.00%> (-0.86%)	⬇️
cmd/cli/plugin/cluster/machinehealthcheck.go	100.00% <0.00%> (ø)
...cluster/delete_machinehealthcheck_control_plane.go	16.66% <0.00%> (ø)
cmd/cli/plugin/cluster/set_node_pool.go	14.63% <0.00%> (ø)
cmd/cli/plugin/cluster/scale.go	17.85% <0.00%> (ø)
cmd/cli/plugin/cluster/create.go	42.22% <0.00%> (ø)
...olated-cluster/imagepushop/publishimagesfromtar.go	73.17% <0.00%> (ø)
cmd/cli/plugin/isolated-cluster/test/main.go	0.00% <0.00%> (ø)
cmd/cli/plugin/cluster/delete.go	12.50% <0.00%> (ø)
... and 24 more

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