Fix error handling in Reject implementation

[GraysonWu]

Fix error handling in Reject implementation, when determining if the
packet belongs to Service traffic.
Because of the situation described in PR #3006, I didn't notice this
bug before. Fix it in this PR.

Signed-off-by: wgrayson wgrayson@vmware.com

[codecov-commenter]

Codecov Report

Merging #3010 (ae84db4) into main (617ce25) will decrease coverage by 1.31%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main    #3010      +/-   ##
==========================================
- Coverage   60.94%   59.63%   -1.32%     
==========================================
  Files         292      292              
  Lines       24708    24710       +2     
==========================================
- Hits        15059    14735     -324     
- Misses       8006     8384     +378     
+ Partials     1643     1591      -52     

Flag	Coverage Δ
kind-e2e-tests	46.31% <50.00%> (-1.85%)	⬇️
unit-tests	40.16% <0.00%> (+<0.01%)	⬆️

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

Impacted Files	Coverage Δ
pkg/agent/controller/networkpolicy/reject.go	69.91% <50.00%> (-0.33%)	⬇️
...g/agent/apiserver/handlers/featuregates/handler.go	0.00% <0.00%> (-82.36%)	⬇️
...kg/apiserver/registry/system/supportbundle/rest.go	19.54% <0.00%> (-55.18%)	⬇️
pkg/support/dump_others.go	0.00% <0.00%> (-51.73%)	⬇️
...ver/registry/controlplane/nodestatssummary/rest.go	50.00% <0.00%> (-50.00%)	⬇️
pkg/support/dump.go	8.13% <0.00%> (-49.60%)	⬇️
...g/agent/apiserver/handlers/addressgroup/handler.go	0.00% <0.00%> (-40.00%)	⬇️
...agent/apiserver/handlers/appliedtogroup/handler.go	0.00% <0.00%> (-40.00%)	⬇️
pkg/ovs/ovsctl/ofctl.go	19.10% <0.00%> (-17.98%)	⬇️
pkg/agent/nodeportlocal/k8s/annotations.go	83.87% <0.00%> (-16.13%)	⬇️
... and 18 more

[antoninbas]

A better commit message may be:

Fix error handling in Reject implementation

When determining if the packet belongs to Service traffic

[tnqn]

LGTM

[tnqn]

/test-all