bugfix: workload namespace is empty while sync appdeployment

[shaowenchen]

Signed-off-by: shaowenchen mail@chenshaowen.com

What this PR does / why we need it:

It raises an error Failed to reconcile appDeployment default/cross-cluster-app: cannot get object: an empty namespace may not be set when a resource name is provided when I test case refers to https://kubevela.io/docs/v1.1/end-user/scopes/appdeploy/#appdeployment

[shaowenchen]

@yangsoon Can you help me to review this pr? This problem blocks my usage.

[codecov]

Codecov Report

Merging #2009 (f3d25b7) into master (b4ebdac) will increase coverage by 0.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2009      +/-   ##
==========================================
+ Coverage   63.72%   63.84%   +0.11%     
==========================================
  Files         158      159       +1     
  Lines       14960    14973      +13     
==========================================
+ Hits         9533     9559      +26     
+ Misses       4452     4442      -10     
+ Partials      975      972       -3     

Flag	Coverage Δ
e2e-rollout-tests	28.72% <0.00%> (+0.03%)	⬆️
e2etests	38.14% <0.00%> (+0.31%)	⬆️
unittests	59.25% <100.00%> (+0.10%)	⬆️

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

Impacted Files	Coverage Δ
...v1alpha2/appdeployment/appdeployment_controller.go	53.51% <100.00%> (+0.18%)	⬆️
...dev/v1alpha2/initializer/initializer_controller.go	78.44% <0.00%> (-3.30%)	⬇️
...pha1/podspecworkload/podspecworkload_controller.go	6.89% <0.00%> (-0.05%)	⬇️
...ard.oam.dev/v1alpha1/rollout/rollout_controller.go	80.19% <0.00%> (ø)
.../core/scopes/healthscope/healthscope_controller.go	84.90% <0.00%> (ø)
...pplicationcontext/applicationcontext_controller.go	82.75% <0.00%> (ø)
...pplicationrollout/applicationrollout_controller.go	83.21% <0.00%> (ø)
...plicationconfiguration/applicationconfiguration.go	89.78% <0.00%> (ø)
pkg/controller/common/context.go	100.00% <0.00%> (ø)
...dev/v1alpha2/application/application_controller.go	83.95% <0.00%> (+0.08%)	⬆️
... and 11 more

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[wonderflow]

good catch, thanks