Add unit test for antctl get featuregates

[luolanzone]

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1. Add unit test for antctl get featuregates command.
2. Replace deprecated io/ioutil with os

Signed-off-by: Lan Luo [email protected]

[codecov[bot]]

Codecov Report

Merging #4256 (f6e8c3e) into main (835e142) will decrease coverage by 0.36%. The diff coverage is 71.42%.

@@            Coverage Diff             @@
##             main    #4256      +/-   ##
==========================================
- Coverage   64.38%   64.01%   -0.37%     
==========================================
  Files         393      397       +4     
  Lines       55538    56283     +745     
==========================================
+ Hits        35760    36032     +272     
- Misses      17188    17637     +449     
- Partials     2590     2614      +24     

Flag	Coverage Δ
e2e-tests	38.95% <ø> (?)
integration-tests	34.53% <ø> (-0.08%)	:arrow_down:
kind-e2e-tests	49.13% <ø> (+0.26%)	:arrow_up:
unit-tests	48.34% <71.42%> (+0.18%)	:arrow_up:

Impacted Files	Coverage Δ
pkg/antctl/raw/proxy/command.go	23.52% <0.00%> (ø)
pkg/antctl/raw/supportbundle/command.go	3.40% <0.00%> (ø)
pkg/antctl/raw/featuregates/command.go	72.32% <75.00%> (+64.40%)	:arrow_up:
pkg/features/antrea_features.go	41.02% <0.00%> (-18.98%)	:arrow_down:
pkg/agent/secondarynetwork/podwatch/controller.go	61.69% <0.00%> (-13.13%)	:arrow_down:
pkg/util/runtime/runtime_linux.go	76.00% <0.00%> (-8.00%)	:arrow_down:
pkg/agent/util/sysctl/sysctl_linux.go	59.25% <0.00%> (-7.41%)	:arrow_down:
...ntrollers/multicluster/serviceexport_controller.go	76.33% <0.00%> (-2.80%)	:arrow_down:
pkg/agent/controller/networkpolicy/packetin.go	74.32% <0.00%> (-2.71%)	:arrow_down:
pkg/controller/traceflow/controller.go	74.72% <0.00%> (-2.53%)	:arrow_down:
... and 36 more

[luolanzone]

@antoninbas @jianjuns @tnqn Could you help to review again? thanks.

[luolanzone]

Seems there is no more review comments, @antoninbas could you help to merge this one? thanks.

[antoninbas]

/test-e2e /skip-conformance /skip-networkpolicy