Do not override global testData in e2e tests

[tnqn]

Otherwise a setup failure would panic and terminate all tests.

For instance: https://jenkins.antrea-ci.rocks/job/antrea-e2e-for-pull-request/2181/console

[antoninbas]

LGTM

[antoninbas]

/test-all

[tnqn]

@jianjuns @antoninbas thanks for quick review.
/test-e2e

[codecov-io]

Codecov Report

Merging #1955 (6aa324d) into main (e80ab3b) will increase coverage by 1.23%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1955      +/-   ##
==========================================
+ Coverage   64.35%   65.58%   +1.23%     
==========================================
  Files         193      193              
  Lines       16967    16967              
==========================================
+ Hits        10919    11128     +209     
+ Misses       4899     4655     -244     
- Partials     1149     1184      +35     

Flag	Coverage Δ
e2e-tests	30.00% <ø> (?)
kind-e2e-tests	55.55% <ø> (+0.34%)	⬆️
unit-tests	41.62% <ø> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
pkg/apiserver/certificate/cacert_controller.go	55.83% <0.00%> (-10.01%)	⬇️
pkg/controller/networkpolicy/status_controller.go	83.55% <0.00%> (-5.27%)	⬇️
pkg/controller/networkpolicy/tier.go	47.50% <0.00%> (-5.00%)	⬇️
pkg/apiserver/apiserver.go	87.25% <0.00%> (-1.97%)	⬇️
pkg/controller/traceflow/controller.go	69.48% <0.00%> (ø)
...ntroller/networkpolicy/networkpolicy_controller.go	84.25% <0.00%> (+0.12%)	⬆️
pkg/agent/openflow/network_policy.go	75.86% <0.00%> (+0.14%)	⬆️
pkg/agent/cniserver/pod_configuration.go	54.68% <0.00%> (+0.78%)	⬆️
pkg/ovs/openflow/ofctrl_bridge.go	49.01% <0.00%> (+1.18%)	⬆️
pkg/ovs/openflow/ofctrl_builder.go	59.06% <0.00%> (+1.34%)	⬆️
... and 10 more

[tnqn]

The jenkins e2e test failed because of #1956, which was not related to this patch.
As the patch is simple enough and all e2e tests on kind clusters have succeeded, skip jenkins e2e test.
/skip-e2e